csaf_redhat - rhsa-2020

rhsa-2020_3223

Vulnerability from csaf_redhat

Published

2020-07-29 19:40

Modified

2024-11-15 08:34

Summary

Red Hat Security Advisory: grub2 security update

Notes

Topic

An update for grub2, shim, shim-unsigned-x64, and fwupd is now available for Red Hat Enterprise Linux 8.1 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. [Updated 3 August 2020] The shim and shim-unsigned-x64 packages distributed with this erratum have a known bug that can cause the boot process to hang on some systems. To prevent boot problems, customers are strongly recommended not to use the shim packages released with this erratum, and instead to apply the newer packages within RHBA-2020:3263, that were released on 1 August 2020 to address this issue.

Details

The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices. The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments. The fwupd packages provide a service that allows session software to update device firmware. Security Fix(es): * grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process (CVE-2020-10713) * grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent heap-based buffer overflow (CVE-2020-14308) * grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow (CVE-2020-14309) * grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow (CVE-2020-14310) * grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow (CVE-2020-14311) * grub2: Fail kernel validation without shim protocol (CVE-2020-15705) * grub2: Use-after-free redefining a function whilst the same function is already executing (CVE-2020-15706) * grub2: Integer overflow in initrd size handling (CVE-2020-15707) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

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{
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      "text": "Moderate"
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        "text": "An update for grub2, shim, shim-unsigned-x64, and fwupd is now available for Red Hat Enterprise Linux 8.1 Extended Update Support.\n\nRed Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.\n\n[Updated 3 August 2020]\n\nThe shim and shim-unsigned-x64 packages distributed with this erratum have a known bug that can cause the boot process to hang on some systems. To prevent boot problems, customers are strongly recommended not to use the shim packages released with this erratum, and instead to apply the newer packages within RHBA-2020:3263, that were released on 1 August 2020 to address this issue.",
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        "text": "The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices.\n\nThe shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments.\n\nThe fwupd packages provide a service that allows session software to update device firmware.\n\nSecurity Fix(es):\n\n* grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process (CVE-2020-10713)\n\n* grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent heap-based buffer overflow (CVE-2020-14308)\n\n* grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow (CVE-2020-14309)\n\n* grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow (CVE-2020-14310)\n\n* grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow (CVE-2020-14311)\n\n* grub2: Fail kernel validation without shim protocol (CVE-2020-15705)\n\n* grub2: Use-after-free redefining a function whilst the same function is already executing (CVE-2020-15706)\n\n* grub2: Integer overflow in initrd size handling (CVE-2020-15707)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
        "title": "Details"
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        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
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          "names": [
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          "organization": "Eclypsium"
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        "name": "Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)"
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          "category": "description",
          "text": "A flaw was found in grub2, prior to version 2.06. An attacker may use the GRUB 2 flaw to hijack and tamper the GRUB  verification process. This flaw also allows the bypass of Secure Boot protections. In order to load an untrusted or modified kernel, an attacker would first need to establish access to the system such as gaining physical access, obtain the ability to alter a pxe-boot network, or have remote access to a  networked system with root access. With this access, an attacker could then craft a string to cause a buffer overflow by injecting a malicious payload that leads to arbitrary code execution within GRUB. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",
          "title": "Vulnerability description"
        },
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          "category": "summary",
          "text": "grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process",
          "title": "Vulnerability summary"
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        {
          "category": "other",
          "text": "Kernel and kernel-rt packages as shipped with Red Hat Enterprise Linux 7 and 8 are being updated to contain the new Red Hat certificate for secure boot.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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          "details": "Moderate"
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      "title": "grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Chris Coulson"
          ],
          "organization": "Ubuntu Security Team"
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      "cve": "CVE-2020-14308",
      "cwe": {
        "id": "CWE-122",
        "name": "Heap-based Buffer Overflow"
      },
      "discovery_date": "2020-06-29T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1852009"
        }
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in current grub2 versions as shipped with Red Hat Enterprise Linux 7 and 8, where the grub memory allocator doesn\u0027t check for possible arithmetic overflows on the requested allocation size. This issue leads the function to return invalid memory allocations, causing heap-based overflows in several code paths. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent heap-based buffer overflow",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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          "url": "https://access.redhat.com/security/cve/CVE-2020-14308"
        },
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          "category": "external",
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1852009"
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          "category": "external",
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          "url": "https://www.cve.org/CVERecord?id=CVE-2020-14308"
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          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-14308",
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      "title": "grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent heap-based buffer overflow"
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        {
          "names": [
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      "cve": "CVE-2020-14309",
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        "name": "Heap-based Buffer Overflow"
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      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "1852022"
        }
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        {
          "category": "description",
          "text": "A flaw was found in grub2. When handling squashfs filesystems containing a symbolic link with name length of UINT32 bytes in size, the name size leads to an arithmetic overflow leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled data. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2020-14309"
        },
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          "category": "external",
          "summary": "RHBZ#1852022",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1852022"
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2020-14309",
          "url": "https://www.cve.org/CVERecord?id=CVE-2020-14309"
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          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-14309",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-14309"
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          "details": "Moderate"
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      "title": "grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow"
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    {
      "acknowledgments": [
        {
          "names": [
            "Chris Coulson"
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          "organization": "Ubuntu Security Team"
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      "cwe": {
        "id": "CWE-122",
        "name": "Heap-based Buffer Overflow"
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      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "1852030"
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        {
          "category": "description",
          "text": "A flaw was found in grub2. An expected font value is not verified before proceeding with buffer allocations allowing an attacker to use a malicious font file to create an arithmetic overflow, zero-sized allocation, and further heap-based buffer overflow. The highest threat from this vulnerability is to data integrity and system availability.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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          "details": "Moderate"
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      "title": "grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Chris Coulson"
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          "organization": "Ubuntu Security Team"
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      "cve": "CVE-2020-14311",
      "cwe": {
        "id": "CWE-122",
        "name": "Heap-based Buffer Overflow"
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      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1852014"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in grub2 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow, leading to a zero-sized memory allocation with a subsequent heap-based buffer overflow. The highest threat from this vulnerability is to integrity and system availability.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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          "category": "impact",
          "details": "Moderate"
        }
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      "title": "grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow"
    },
    {
      "cve": "CVE-2020-15705",
      "cwe": {
        "id": "CWE-440",
        "name": "Expected Behavior Violation"
      },
      "discovery_date": "2020-07-27T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1860978"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "grub2: Fail kernel validation without shim protocol",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
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          "url": "https://access.redhat.com/security/cve/CVE-2020-15705"
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          "category": "external",
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          "url": "https://www.cve.org/CVERecord?id=CVE-2020-15705"
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      "title": "grub2: Fail kernel validation without shim protocol"
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          "names": [
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          "text": "1861118"
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          "text": "GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "grub2: Use-after-free redefining a function whilst the same function is already executing",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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      "title": "grub2: Use-after-free redefining a function whilst the same function is already executing"
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      "acknowledgments": [
        {
          "names": [
            "Chris Coulson"
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          "organization": "Canonical"
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        {
          "names": [
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      "cve": "CVE-2020-15707",
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      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "1861581"
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      "notes": [
        {
          "category": "description",
          "text": "Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. This issue affects GRUB2 version 2.04 and prior versions.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "grub2: Integer overflow in initrd size handling",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "There\u0027s no mitigation available other than installing the update packages.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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          "restart_required": {
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          "url": "https://access.redhat.com/errata/RHSA-2020:3223"
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            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H",
            "version": "3.1"
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "grub2: Integer overflow in initrd size handling"
    }
  ]
}

cve-2020-10713

Vulnerability from cvelistv5

Published

2020-07-30 12:58

Modified

2024-08-04 11:14

Severity ?

Summary

A flaw was found in grub2, prior to version 2.06. An attacker may use the GRUB 2 flaw to hijack and tamper the GRUB verification process. This flaw also allows the bypass of Secure Boot protections. In order to load an untrusted or modified kernel, an attacker would first need to establish access to the system such as gaining physical access, obtain the ability to alter a pxe-boot network, or have remote access to a networked system with root access. With this access, an attacker could then craft a string to cause a buffer overflow by injecting a malicious payload that leads to arbitrary code execution within GRUB. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

References

▼	URL	Tags
	https://www.debian.org/security/2020/dsa-4735	vendor-advisory, x_refsource_DEBIAN
	http://www.openwall.com/lists/oss-security/2020/07/29/3	mailing-list, x_refsource_MLIST
	https://bugzilla.redhat.com/show_bug.cgi?id=1825243	x_refsource_MISC
	https://www.kb.cert.org/vuls/id/174059	third-party-advisory, x_refsource_CERT-VN
	https://security.netapp.com/advisory/ntap-20200731-0008/	x_refsource_CONFIRM
	https://usn.ubuntu.com/4432-1/	vendor-advisory, x_refsource_UBUNTU
	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-grub2-code-exec-xLePCAPY	vendor-advisory, x_refsource_CISCO
	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html	vendor-advisory, x_refsource_SUSE
	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html	vendor-advisory, x_refsource_SUSE
	https://eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/	x_refsource_MISC
	https://kb.vmware.com/s/article/80181	x_refsource_MISC
	https://cve.openeuler.org/#/CVEInfo/CVE-2020-10713	x_refsource_MISC
	https://security.gentoo.org/glsa/202104-05	vendor-advisory, x_refsource_GENTOO

Impacted products

▼	Vendor	Product
	n/a	Grub

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T11:14:14.235Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "DSA-4735",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2020/dsa-4735"
          },
          {
            "name": "[oss-security] 20200729 multiple secure boot grub2 and linux kernel vulnerabilities",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2020/07/29/3"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
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            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1825243"
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            "tags": [
              "third-party-advisory",
              "x_refsource_CERT-VN",
              "x_transferred"
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            "url": "https://www.kb.cert.org/vuls/id/174059"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20200731-0008/"
          },
          {
            "name": "USN-4432-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
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            "url": "https://usn.ubuntu.com/4432-1/"
          },
          {
            "name": "20200804 GRUB2 Arbitrary Code Execution Vulnerability",
            "tags": [
              "vendor-advisory",
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              "x_transferred"
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          },
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            "tags": [
              "vendor-advisory",
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            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html"
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          {
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          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
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            "url": "https://cve.openeuler.org/#/CVEInfo/CVE-2020-10713"
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          {
            "name": "GLSA-202104-05",
            "tags": [
              "vendor-advisory",
              "x_refsource_GENTOO",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202104-05"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Grub",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "All grub2 versions before 2.06"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A flaw was found in grub2, prior to version 2.06. An attacker may use the GRUB 2 flaw to hijack and tamper the GRUB verification process. This flaw also allows the bypass of Secure Boot protections. In order to load an untrusted or modified kernel, an attacker would first need to establish access to the system such as gaining physical access, obtain the ability to alter a pxe-boot network, or have remote access to a networked system with root access. With this access, an attacker could then craft a string to cause a buffer overflow by injecting a malicious payload that leads to arbitrary code execution within GRUB. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability."
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      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Out-of-bounds Write leading to Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
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              "type": "text"
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          ]
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cve-2020-15706

Vulnerability from cvelistv5

Published

2020-07-29 17:45

Modified

2024-09-16 22:20

Severity ?

6.4 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Summary

GRUB2 contains a race condition leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing.

References

▼	URL	Tags
	https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/	x_refsource_CONFIRM
	https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass	vendor-advisory, x_refsource_UBUNTU
	http://ubuntu.com/security/notices/USN-4432-1	vendor-advisory, x_refsource_UBUNTU
	https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot	vendor-advisory, x_refsource_DEBIAN
	https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011	x_refsource_CONFIRM
	https://access.redhat.com/security/vulnerabilities/grub2bootloader	vendor-advisory, x_refsource_REDHAT
	https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/	vendor-advisory, x_refsource_SUSE
	https://www.suse.com/support/kb/doc/?id=000019673	vendor-advisory, x_refsource_SUSE
	https://www.openwall.com/lists/oss-security/2020/07/29/3	x_refsource_CONFIRM
	https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html	x_refsource_CONFIRM
	https://www.debian.org/security/2020/dsa-4735	vendor-advisory, x_refsource_DEBIAN
	http://www.openwall.com/lists/oss-security/2020/07/29/3	mailing-list, x_refsource_MLIST
	https://security.netapp.com/advisory/ntap-20200731-0008/	x_refsource_CONFIRM
	https://usn.ubuntu.com/4432-1/	vendor-advisory, x_refsource_UBUNTU
	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html	vendor-advisory, x_refsource_SUSE
	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html	vendor-advisory, x_refsource_SUSE
	https://security.gentoo.org/glsa/202104-05	vendor-advisory, x_refsource_GENTOO

Impacted products

▼	Vendor	Product
	Ubuntu	grub2 in Ubuntu

Show details on NVD website

JSON

To clipboard

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        "references": {
          "reference_data": [
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              "name": "https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/",
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              "url": "https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/"
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              "refsource": "UBUNTU",
              "url": "https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass"
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              "url": "http://ubuntu.com/security/notices/USN-4432-1"
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              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot"
            },
            {
              "name": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011",
              "refsource": "CONFIRM",
              "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011"
            },
            {
              "name": "https://access.redhat.com/security/vulnerabilities/grub2bootloader",
              "refsource": "REDHAT",
              "url": "https://access.redhat.com/security/vulnerabilities/grub2bootloader"
            },
            {
              "name": "https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/",
              "refsource": "SUSE",
              "url": "https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/"
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              "name": "https://www.suse.com/support/kb/doc/?id=000019673",
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              "url": "https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html"
            },
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              "name": "DSA-4735",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2020/dsa-4735"
            },
            {
              "name": "[oss-security] 20200729 multiple secure boot grub2 and linux kernel vulnerabilities",
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cve-2020-14311

Vulnerability from cvelistv5

Published

2020-07-31 20:56

Modified

2024-08-04 12:39

Severity ?

5.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H

Summary

There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a zero-sized memory allocation with subsequent heap-based buffer overflow.

References

▼	URL	Tags
	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311	x_refsource_CONFIRM
	https://usn.ubuntu.com/4432-1/	vendor-advisory, x_refsource_UBUNTU
	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html	vendor-advisory, x_refsource_SUSE
	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html	vendor-advisory, x_refsource_SUSE
	https://security.gentoo.org/glsa/202104-05	vendor-advisory, x_refsource_GENTOO
	http://www.openwall.com/lists/oss-security/2021/09/17/2	mailing-list, x_refsource_MLIST
	http://www.openwall.com/lists/oss-security/2021/09/17/4	mailing-list, x_refsource_MLIST
	http://www.openwall.com/lists/oss-security/2021/09/21/1	mailing-list, x_refsource_MLIST

Impacted products

▼	Vendor	Product
	The Grub2 Project	grub2

Show details on NVD website

JSON

To clipboard

{
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cve-2020-14309

Vulnerability from cvelistv5

Published

2020-07-30 12:49

Modified

2024-08-04 12:39

Severity ?

Summary

There's an issue with grub2 in all versions before 2.06 when handling squashfs filesystems containing a symbolic link with name length of UINT32 bytes in size. The name size leads to an arithmetic overflow leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled data.

References

▼	URL	Tags
	https://bugzilla.redhat.com/show_bug.cgi?id=1852022	x_refsource_MISC
	https://security.netapp.com/advisory/ntap-20200731-0008/	x_refsource_CONFIRM
	https://usn.ubuntu.com/4432-1/	vendor-advisory, x_refsource_UBUNTU
	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html	vendor-advisory, x_refsource_SUSE
	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html	vendor-advisory, x_refsource_SUSE
	https://security.gentoo.org/glsa/202104-05	vendor-advisory, x_refsource_GENTOO

Impacted products

▼	Vendor	Product
	n/a	Grub

Show details on NVD website

JSON

To clipboard

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    "datePublished": "2020-07-30T12:49:31",
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cve-2020-14308

Vulnerability from cvelistv5

Published

2020-07-29 19:03

Modified

2024-08-04 12:39

Severity ?

Summary

In grub2 versions before 2.06 the grub memory allocator doesn't check for possible arithmetic overflows on the requested allocation size. This leads the function to return invalid memory allocations which can be further used to cause possible integrity, confidentiality and availability impacts during the boot process.

References

▼	URL	Tags
	https://bugzilla.redhat.com/show_bug.cgi?id=1852009	x_refsource_MISC
	http://www.openwall.com/lists/oss-security/2020/07/29/3	mailing-list, x_refsource_MLIST
	https://security.netapp.com/advisory/ntap-20200731-0008/	x_refsource_CONFIRM
	https://usn.ubuntu.com/4432-1/	vendor-advisory, x_refsource_UBUNTU
	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html	vendor-advisory, x_refsource_SUSE
	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html	vendor-advisory, x_refsource_SUSE
	https://security.gentoo.org/glsa/202104-05	vendor-advisory, x_refsource_GENTOO
	http://www.openwall.com/lists/oss-security/2021/09/17/2	mailing-list, x_refsource_MLIST
	http://www.openwall.com/lists/oss-security/2021/09/17/4	mailing-list, x_refsource_MLIST
	http://www.openwall.com/lists/oss-security/2021/09/21/1	mailing-list, x_refsource_MLIST

Impacted products

▼	Vendor	Product
	n/a	Grub

Show details on NVD website

JSON

To clipboard

{
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cve-2020-15705

Vulnerability from cvelistv5

Published

2020-07-29 17:45

Modified

2024-09-17 00:06

Severity ?

6.4 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Summary

GRUB2: avoid loading unsigned kernels when GRUB is booted directly under secureboot without shim

References

▼	URL	Tags
	https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/	x_refsource_CONFIRM
	https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass	vendor-advisory, x_refsource_UBUNTU
	http://ubuntu.com/security/notices/USN-4432-1	vendor-advisory, x_refsource_UBUNTU
	https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot	vendor-advisory, x_refsource_DEBIAN
	https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011	x_refsource_CONFIRM
	https://access.redhat.com/security/vulnerabilities/grub2bootloader	vendor-advisory, x_refsource_REDHAT
	https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/	vendor-advisory, x_refsource_SUSE
	https://www.suse.com/support/kb/doc/?id=000019673	vendor-advisory, x_refsource_SUSE
	https://www.openwall.com/lists/oss-security/2020/07/29/3	x_refsource_CONFIRM
	https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html	x_refsource_CONFIRM
	http://www.openwall.com/lists/oss-security/2020/07/29/3	mailing-list, x_refsource_MLIST
	https://security.netapp.com/advisory/ntap-20200731-0008/	x_refsource_CONFIRM
	https://usn.ubuntu.com/4432-1/	vendor-advisory, x_refsource_UBUNTU
	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00067.html	vendor-advisory, x_refsource_SUSE
	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00069.html	vendor-advisory, x_refsource_SUSE
	http://www.openwall.com/lists/oss-security/2021/03/02/3	mailing-list, x_refsource_MLIST
	https://security.gentoo.org/glsa/202104-05	vendor-advisory, x_refsource_GENTOO
	http://www.openwall.com/lists/oss-security/2021/09/17/2	mailing-list, x_refsource_MLIST
	http://www.openwall.com/lists/oss-security/2021/09/17/4	mailing-list, x_refsource_MLIST
	http://www.openwall.com/lists/oss-security/2021/09/21/1	mailing-list, x_refsource_MLIST

Impacted products

▼	Vendor	Product
	Ubuntu	grub2 in Ubuntu

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      {
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          "dateUpdated": "2024-08-04T13:22:30.823Z",
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          "versions": [
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              "status": "affected",
              "version": "20.04 LTS",
              "versionType": "custom"
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              "lessThan": "2.02-2ubuntu8.16",
              "status": "affected",
              "version": "18.04 LTS",
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              "status": "affected",
              "version": "16.04 LTS",
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              "status": "affected",
              "version": "14.04 ESM",
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      ],
      "credits": [
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          "lang": "en",
          "value": "Mathieu Trudel-Lapierre"
        }
      ],
      "datePublic": "2020-07-29T00:00:00",
      "descriptions": [
        {
          "lang": "en",
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cve-2020-15707

Vulnerability from cvelistv5

Published

2020-07-29 17:45

Modified

2024-09-17 03:07

Severity ?

5.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H

Summary

GRUB2 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.

References

▼	URL	Tags
	https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/	x_refsource_CONFIRM
	https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass	vendor-advisory, x_refsource_UBUNTU
	http://ubuntu.com/security/notices/USN-4432-1	vendor-advisory, x_refsource_UBUNTU
	https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot	vendor-advisory, x_refsource_DEBIAN
	https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011	x_refsource_CONFIRM
	https://access.redhat.com/security/vulnerabilities/grub2bootloader	vendor-advisory, x_refsource_REDHAT
	https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/	vendor-advisory, x_refsource_SUSE
	https://www.suse.com/support/kb/doc/?id=000019673	vendor-advisory, x_refsource_SUSE
	https://www.openwall.com/lists/oss-security/2020/07/29/3	x_refsource_CONFIRM
	https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html	x_refsource_CONFIRM
	https://www.debian.org/security/2020/dsa-4735	vendor-advisory, x_refsource_DEBIAN
	http://www.openwall.com/lists/oss-security/2020/07/29/3	mailing-list, x_refsource_MLIST
	https://security.netapp.com/advisory/ntap-20200731-0008/	x_refsource_CONFIRM
	https://usn.ubuntu.com/4432-1/	vendor-advisory, x_refsource_UBUNTU
	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html	vendor-advisory, x_refsource_SUSE
	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html	vendor-advisory, x_refsource_SUSE
	https://security.gentoo.org/glsa/202104-05	vendor-advisory, x_refsource_GENTOO

Impacted products

▼	Vendor	Product
	Ubuntu	grub2 in Ubuntu

Show details on NVD website

JSON

To clipboard

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cve-2020-14310

Vulnerability from cvelistv5

Published

2020-07-31 20:55

Modified

2024-08-04 12:39

Severity ?

5.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H

Summary

There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer allocation to read the value from the font value. An attacker may leverage that by crafting a malicious font file which has a name with UINT32_MAX, leading to read_section_as_string() to an arithmetic overflow, zero-sized allocation and further heap-based buffer overflow.

References

▼	URL	Tags
	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14310	x_refsource_CONFIRM
	https://usn.ubuntu.com/4432-1/	vendor-advisory, x_refsource_UBUNTU
	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html	vendor-advisory, x_refsource_SUSE
	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html	vendor-advisory, x_refsource_SUSE
	https://security.gentoo.org/glsa/202104-05	vendor-advisory, x_refsource_GENTOO

Impacted products

▼	Vendor	Product
	The Grub2 Project	grub2

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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Vulnerability from cvelistv5

Vulnerability from cvelistv5

Vulnerability from cvelistv5

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Tags

Sightings

Nomenclature