rhsa-2021_4198
Vulnerability from csaf_redhat
Published
2021-11-09 18:33
Modified
2024-11-06 00:05
Summary
Red Hat Security Advisory: edk2 security, bug fix, and enhancement update

Notes

Topic
An update for edk2 is now available for Red Hat Enterprise Linux 8. 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.
Details
EDK (Embedded Development Kit) is a project to enable UEFI support for Virtual Machines. This package contains a sample 64-bit UEFI firmware for QEMU and KVM. The following packages have been upgraded to a later upstream version: edk2 (20210527gite1999b264f1f). (BZ#1846481, BZ#1938238) Security Fix(es): * openssl: integer overflow in CipherUpdate (CVE-2021-23840) * openssl: NULL pointer dereference in X509_issuer_and_serial_hash() (CVE-2021-23841) 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. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.
Terms of Use
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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        "text": "An update for edk2 is now available for Red Hat Enterprise Linux 8.\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.",
        "title": "Topic"
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        "text": "EDK (Embedded Development Kit) is a project to enable UEFI support for Virtual Machines. This package contains a sample 64-bit UEFI firmware for QEMU and KVM. \n\nThe following packages have been upgraded to a later upstream version: edk2 (20210527gite1999b264f1f). (BZ#1846481, BZ#1938238)\n\nSecurity Fix(es):\n\n* openssl: integer overflow in CipherUpdate (CVE-2021-23840)\n\n* openssl: NULL pointer dereference in X509_issuer_and_serial_hash() (CVE-2021-23841)\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.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.",
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      "discovery_date": "2020-10-15T00:00:00+00:00",
      "ids": [
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          "text": "1889486"
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      "notes": [
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          "category": "description",
          "text": "Null pointer dereference in Tianocore EDK2 may allow an authenticated user to potentially enable escalation of privilege via local access.",
          "title": "Vulnerability description"
        },
        {
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          "text": "edk2: NULL pointer dereference in AuthenticodeVerify()",
          "title": "Vulnerability summary"
        },
        {
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          "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://bugzilla.redhat.com/show_bug.cgi?id=1889486"
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      ],
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          "date": "2021-11-09T18:33:45+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",
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
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      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
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      ],
      "title": "edk2: NULL pointer dereference in AuthenticodeVerify()"
    },
    {
      "cve": "CVE-2021-23840",
      "cwe": {
        "id": "CWE-190",
        "name": "Integer Overflow or Wraparound"
      },
      "discovery_date": "2021-02-09T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1930324"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument in some cases where the input length is close to the maximum permissible length for an integer on the platform. In such cases the return value from the function call will be 1 (indicating success), but the output length value will be negative. This could cause applications to behave incorrectly or crash.",
          "title": "Vulnerability description"
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        {
          "category": "summary",
          "text": "openssl: integer overflow in CipherUpdate",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This flaw only affects applications which are compiled with OpenSSL and using  EVP_CipherUpdate, EVP_EncryptUpdate or EVP_DecryptUpdate functions. When specially-crafted values are passed to these functions, it can cause the application to crash or behave incorrectly.\n\nOpenSSL in Red Hat Enterprise Linux 9 was marked as not affected as its already fixed in RHEL9 Alpha release.",
          "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": "external",
          "summary": "https://www.openssl.org/news/secadv/20210216.txt",
          "url": "https://www.openssl.org/news/secadv/20210216.txt"
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      "scores": [
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            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
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      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "openssl: integer overflow in CipherUpdate"
    },
    {
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      "cwe": {
        "id": "CWE-476",
        "name": "NULL Pointer Dereference"
      },
      "discovery_date": "2021-02-16T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1930310"
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      ],
      "notes": [
        {
          "category": "description",
          "text": "The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a potential denial of service attack.",
          "title": "Vulnerability description"
        },
        {
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          "text": "openssl: NULL pointer dereference in X509_issuer_and_serial_hash()",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is a a null pointer dereference in the X509_issuer_and_serial_hash()  function, which can result in crash if called by an application compiled with OpenSSL, by passing a specially-crafted certificate. OpenSSL internally does not use this function.",
          "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"
        }
      ],
      "product_status": {
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          "url": "https://access.redhat.com/security/cve/CVE-2021-23841"
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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",
          "product_ids": [
            "AppStream-8.5.0.GA:edk2-0:20210527gite1999b264f1f-3.el8.src",
            "AppStream-8.5.0.GA:edk2-aarch64-0:20210527gite1999b264f1f-3.el8.noarch",
            "AppStream-8.5.0.GA:edk2-ovmf-0:20210527gite1999b264f1f-3.el8.noarch"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2021:4198"
        },
        {
          "category": "workaround",
          "details": "As per upstream \"The function X509_issuer_and_serial_hash() is never directly called by OpenSSL itself so applications are only vulnerable if they use this function directly and they use it on certificates that may have been obtained from untrusted sources.\"",
          "product_ids": [
            "AppStream-8.5.0.GA:edk2-0:20210527gite1999b264f1f-3.el8.src",
            "AppStream-8.5.0.GA:edk2-aarch64-0:20210527gite1999b264f1f-3.el8.noarch",
            "AppStream-8.5.0.GA:edk2-ovmf-0:20210527gite1999b264f1f-3.el8.noarch"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "AppStream-8.5.0.GA:edk2-0:20210527gite1999b264f1f-3.el8.src",
            "AppStream-8.5.0.GA:edk2-aarch64-0:20210527gite1999b264f1f-3.el8.noarch",
            "AppStream-8.5.0.GA:edk2-ovmf-0:20210527gite1999b264f1f-3.el8.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "openssl: NULL pointer dereference in X509_issuer_and_serial_hash()"
    },
    {
      "cve": "CVE-2021-28210",
      "cwe": {
        "id": "CWE-674",
        "name": "Uncontrolled Recursion"
      },
      "discovery_date": "2020-09-29T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1883552"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in edk2. An unlimited recursion in DxeCore may allow an attacker to corrupt the system memory. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "edk2: unlimited FV recursion, round 2",
          "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"
        }
      ],
      "product_status": {
        "fixed": [
          "AppStream-8.5.0.GA:edk2-0:20210527gite1999b264f1f-3.el8.src",
          "AppStream-8.5.0.GA:edk2-aarch64-0:20210527gite1999b264f1f-3.el8.noarch",
          "AppStream-8.5.0.GA:edk2-ovmf-0:20210527gite1999b264f1f-3.el8.noarch"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2021-28210"
        },
        {
          "category": "external",
          "summary": "RHBZ#1883552",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1883552"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2021-28210",
          "url": "https://www.cve.org/CVERecord?id=CVE-2021-28210"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2021-28210",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-28210"
        }
      ],
      "release_date": "2020-11-19T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2021-11-09T18:33:45+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",
          "product_ids": [
            "AppStream-8.5.0.GA:edk2-0:20210527gite1999b264f1f-3.el8.src",
            "AppStream-8.5.0.GA:edk2-aarch64-0:20210527gite1999b264f1f-3.el8.noarch",
            "AppStream-8.5.0.GA:edk2-ovmf-0:20210527gite1999b264f1f-3.el8.noarch"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2021:4198"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "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",
            "version": "3.1"
          },
          "products": [
            "AppStream-8.5.0.GA:edk2-0:20210527gite1999b264f1f-3.el8.src",
            "AppStream-8.5.0.GA:edk2-aarch64-0:20210527gite1999b264f1f-3.el8.noarch",
            "AppStream-8.5.0.GA:edk2-ovmf-0:20210527gite1999b264f1f-3.el8.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "edk2: unlimited FV recursion, round 2"
    }
  ]
}


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