csaf_redhat - rhsa-2021

rhsa-2021_1379

Vulnerability from csaf_redhat

Published

2021-04-27 07:25

Modified

2024-11-05 23:30

Summary

Red Hat Security Advisory: kernel-alt security and bug fix update

Notes

Topic

An update for kernel-alt is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. 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.

Details

The kernel-alt packages provide the Linux kernel version 4.x. Security Fix(es): * kernel: Use after free via PI futex state (CVE-2021-3347) * kernel: out-of-bounds read in libiscsi module (CVE-2021-27364) * kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365) * kernel: powerpc: guest can cause DoS on POWER9 KVM hosts (CVE-2020-11669) 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. Bug Fix(es): * Kernel oops when resizing ext4 filesystem [rhel-alt-7.6.z] (BZ#1790900) * [ipv6][ipsec]:unregister_netdevice: waiting for lo to become free. Usage count = 4 (BZ#1920805)

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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        "name": "Return of Wrong Status Code"
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          "category": "description",
          "text": "A flaw was found in the way Linux kernel running on the Power9  processor saves and restores its registers while going in and coming out of an idle state. The issue occurs when a guest kernel has Kernel Userspace Address Protection (KUAP) feature enabled. The idle_book3s function does not save and restore the Authority Mask Register (AMR), Authority Mask Override Register (AMOR) and User Authority Mask Override Register (UAMOR). A guest user may use this flaw to render the host system unusable resulting in DoS issue.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: powerpc: guest can cause DoS on POWER9 KVM hosts",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue does not affect the versions of the kernel package as shipped with the Red Hat Enterprise Linux 5, 6, 7, 8 and Red Hat Enterprise MRG 2.",
          "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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          "category": "description",
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          "title": "Vulnerability description"
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          "text": "kernel: Use after free via PI futex state",
          "title": "Vulnerability summary"
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          "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": "Important"
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      "title": "kernel: Use after free via PI futex state"
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    {
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        {
          "names": [
            "Adam Nichols"
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          "organization": "GRIMM"
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      "cve": "CVE-2021-27364",
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        "name": "Out-of-bounds Read"
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          "system_name": "Red Hat Bugzilla ID",
          "text": "1930080"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel. An out-of-bounds read was discovered in the libiscsi module that could lead to reading kernel memory or a crash. The highest threat from this vulnerability is to data confidentiality as well as system availability.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: out-of-bounds read in libiscsi module",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat Product Security is aware of this issue. Updates will be released as they become available.",
          "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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          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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          "category": "impact",
          "details": "Important"
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      "title": "kernel: out-of-bounds read in libiscsi module"
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    {
      "acknowledgments": [
        {
          "names": [
            "Adam Nichols"
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          "organization": "GRIMM"
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      "cwe": {
        "id": "CWE-122",
        "name": "Heap-based Buffer Overflow"
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      "discovery_date": "2021-02-18T00:00:00+00:00",
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          "system_name": "Red Hat Bugzilla ID",
          "text": "1930078"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel. A heap buffer overflow in the iSCSI subsystem is triggered by setting an iSCSI string attribute to a value larger than one page and then trying to read it. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: heap buffer overflow in the iSCSI subsystem",
          "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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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2021-27365"
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        {
          "category": "external",
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          "category": "external",
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-27365"
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          "category": "external",
          "summary": "https://www.openwall.com/lists/oss-security/2021/03/06/1",
          "url": "https://www.openwall.com/lists/oss-security/2021/03/06/1"
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      "release_date": "2021-03-05T00:00:00+00:00",
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          "category": "vendor_fix",
          "date": "2021-04-27T07:25:25+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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          "restart_required": {
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          "url": "https://access.redhat.com/errata/RHSA-2021:1379"
        },
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      "scores": [
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          "cvss_v3": {
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            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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      "threats": [
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      "title": "kernel: heap buffer overflow in the iSCSI subsystem"
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}

cve-2021-27364

Vulnerability from cvelistv5

Published

2021-03-07 04:03

Modified

2024-08-03 20:48

Severity ?

Summary

An issue was discovered in the Linux kernel through 5.11.3. drivers/scsi/scsi_transport_iscsi.c is adversely affected by the ability of an unprivileged user to craft Netlink messages.

References

▼	URL	Tags
	https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html	mailing-list, x_refsource_MLIST
	https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html	mailing-list, x_refsource_MLIST
	https://www.oracle.com/security-alerts/cpuoct2021.html	x_refsource_MISC
	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=688e8128b7a92df982709a4137ea4588d16f24aa	x_refsource_MISC
	https://www.openwall.com/lists/oss-security/2021/03/06/1	x_refsource_MISC
	https://bugzilla.suse.com/show_bug.cgi?id=1182717	x_refsource_MISC
	https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.html	x_refsource_MISC
	http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html	x_refsource_MISC
	https://security.netapp.com/advisory/ntap-20210409-0001/	x_refsource_CONFIRM

Impacted products

▼	Vendor	Product
	n/a	n/a

Show details on NVD website

JSON

To clipboard

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cve-2021-27365

Vulnerability from cvelistv5

Published

2021-03-07 04:22

Modified

2024-08-03 20:48

Severity ?

Summary

An issue was discovered in the Linux kernel through 5.11.3. Certain iSCSI data structures do not have appropriate length constraints or checks, and can exceed the PAGE_SIZE value. An unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message.

References

▼	URL	Tags
	https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html	mailing-list, x_refsource_MLIST
	https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html	mailing-list, x_refsource_MLIST
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	https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.html	x_refsource_MISC
	http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html	x_refsource_MISC
	https://security.netapp.com/advisory/ntap-20210409-0001/	x_refsource_CONFIRM
	https://bugzilla.suse.com/show_bug.cgi?id=1182715	x_refsource_MISC
	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ec98ea7070e94cc25a422ec97d1421e28d97b7ee	x_refsource_MISC
	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f9dbdf97a5bd92b1a49cee3d591b55b11fd7a6d5	x_refsource_MISC

Impacted products

▼	Vendor	Product
	n/a	n/a

Show details on NVD website

JSON

To clipboard

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cve-2021-3347

Vulnerability from cvelistv5

Published

2021-01-29 16:56

Modified

2024-08-03 16:53

Severity ?

Summary

An issue was discovered in the Linux kernel through 5.10.11. PI futexes have a kernel stack use-after-free during fault handling, allowing local users to execute code in the kernel, aka CID-34b1a1ce1458.

References

▼	URL	Tags
	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c64396cc36c6e60704ab06c1fb1c4a46179c9120	x_refsource_MISC
	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=34b1a1ce1458f50ef27c54e28eb9b1947012907a	x_refsource_MISC
	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f2dac39d93987f7de1e20b3988c8685523247ae2	x_refsource_MISC
	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6ccc84f917d33312eb2846bd7b567639f585ad6d	x_refsource_MISC
	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2156ac1934166d6deb6cd0f6ffc4c1076ec63697	x_refsource_MISC
	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c5cade200ab9a2a3be9e7f32a752c8d86b502ec7	x_refsource_MISC
	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=04b79c55201f02ffd675e1231d731365e335c307	x_refsource_MISC
	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=12bb3f7f1b03d5913b3f9d4236a488aa7774dfe9	x_refsource_MISC
	https://www.openwall.com/lists/oss-security/2021/01/29/3	x_refsource_MISC
	https://www.openwall.com/lists/oss-security/2021/01/29/1	x_refsource_MISC
	http://www.openwall.com/lists/oss-security/2021/01/29/5	mailing-list, x_refsource_MLIST
	http://www.openwall.com/lists/oss-security/2021/01/29/4	mailing-list, x_refsource_MLIST
	http://www.openwall.com/lists/oss-security/2021/02/01/4	mailing-list, x_refsource_MLIST
	https://www.debian.org/security/2021/dsa-4843	vendor-advisory, x_refsource_DEBIAN
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CXAVDAK4RLAHBHHGEPL73UFXSI6BXQ7Q/	vendor-advisory, x_refsource_FEDORA
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QOBMXDJABYE76RKNBAWA2E4TSSBX7CSJ/	vendor-advisory, x_refsource_FEDORA
	https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html	mailing-list, x_refsource_MLIST
	https://security.netapp.com/advisory/ntap-20210304-0005/	x_refsource_CONFIRM
	https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html	mailing-list, x_refsource_MLIST

Impacted products

▼	Vendor	Product
	n/a	n/a

Show details on NVD website

JSON

To clipboard

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cve-2020-11669

Vulnerability from cvelistv5

Published

2020-04-10 14:40

Modified

2024-08-04 11:35

Severity ?

Summary

An issue was discovered in the Linux kernel before 5.2 on the powerpc platform. arch/powerpc/kernel/idle_book3s.S does not have save/restore functionality for PNV_POWERSAVE_AMR, PNV_POWERSAVE_UAMOR, and PNV_POWERSAVE_AMOR, aka CID-53a712bae5dd.

References

▼	URL	Tags
	https://access.redhat.com/errata/RHSA-2019:3517	vendor-advisory, x_refsource_REDHAT
	https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2	x_refsource_MISC
	https://lists.ozlabs.org/pipermail/linuxppc-dev/2020-April/208663.html	x_refsource_MISC
	https://lists.ozlabs.org/pipermail/linuxppc-dev/2020-April/208660.html	x_refsource_MISC
	https://lists.ozlabs.org/pipermail/linuxppc-dev/2020-April/208661.html	x_refsource_MISC
	https://github.com/torvalds/linux/commit/53a712bae5dd919521a58d7bad773b949358add0	x_refsource_CONFIRM
	https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=53a712bae5dd919521a58d7bad773b949358add0	x_refsource_CONFIRM
	http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00035.html	vendor-advisory, x_refsource_SUSE
	https://security.netapp.com/advisory/ntap-20200430-0001/	x_refsource_CONFIRM
	https://usn.ubuntu.com/4368-1/	vendor-advisory, x_refsource_UBUNTU
	https://usn.ubuntu.com/4363-1/	vendor-advisory, x_refsource_UBUNTU

Impacted products

▼	Vendor	Product
	n/a	n/a

Show details on NVD website

JSON

To clipboard

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              "url": "https://github.com/torvalds/linux/commit/53a712bae5dd919521a58d7bad773b949358add0"
            },
            {
              "name": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=53a712bae5dd919521a58d7bad773b949358add0",
              "refsource": "CONFIRM",
              "url": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=53a712bae5dd919521a58d7bad773b949358add0"
            },
            {
              "name": "openSUSE-SU-2020:0543",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00035.html"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20200430-0001/",
              "refsource": "CONFIRM",
              "url": "https://security.netapp.com/advisory/ntap-20200430-0001/"
            },
            {
              "name": "USN-4368-1",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/4368-1/"
            },
            {
              "name": "USN-4363-1",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/4363-1/"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2020-11669",
    "datePublished": "2020-04-10T14:40:19",
    "dateReserved": "2020-04-09T00:00:00",
    "dateUpdated": "2024-08-04T11:35:13.507Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Action not permitted

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