suse-su-2021:4021-1
Vulnerability from csaf_suse
Published
2021-12-14 08:15
Modified
2021-12-14 08:15
Summary
Security update for the Linux Kernel (Live Patch 25 for SLE 12 SP5)

Notes

Title of the patch
Security update for the Linux Kernel (Live Patch 25 for SLE 12 SP5)
Description of the patch
This update for the Linux Kernel 4.12.14-122_98 fixes several issues. The following security issues were fixed: - CVE-2021-0941: In bpf_skb_change_head of filter.c, there is a possible out of bounds read due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation (bnc#1192045). - CVE-2021-20322: Make the ipv4 and ipv6 ICMP exception caches less predictive to avoid information leaks about UDP ports in use. (bsc#1191790) - CVE-2021-0935: In ip6_xmit of ip6_output.c, there is a possible out of bounds write due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. (bsc#1192032)
Patchnames
SUSE-2021-4021,SUSE-SLE-Live-Patching-12-SP5-2021-4021
Terms of use
CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).


To clipboard 

{
  "document": {
    "aggregate_severity": {
      "namespace": "https://www.suse.com/support/security/rating/",
      "text": "important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright 2024 SUSE LLC. All rights reserved.",
      "tlp": {
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        "text": "This update for the Linux Kernel 4.12.14-122_98 fixes several issues.\n\nThe following security issues were fixed:\n\n- CVE-2021-0941: In bpf_skb_change_head of filter.c, there is a possible out of bounds read due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation (bnc#1192045).\n- CVE-2021-20322: Make the ipv4 and ipv6 ICMP exception caches less predictive to avoid information leaks about UDP ports in use. (bsc#1191790)\n- CVE-2021-0935: In ip6_xmit of ip6_output.c, there is a possible out of bounds write due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. (bsc#1192032)\n",
        "title": "Description of the patch"
      },
      {
        "category": "details",
        "text": "SUSE-2021-4021,SUSE-SLE-Live-Patching-12-SP5-2021-4021",
        "title": "Patchnames"
      },
      {
        "category": "legal_disclaimer",
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    "publisher": {
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        "category": "self",
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        "url": "https://lists.suse.com/pipermail/sle-security-updates/2021-December/009891.html"
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        "summary": "SUSE Bug 1192042",
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        "summary": "SUSE Bug 1192048",
        "url": "https://bugzilla.suse.com/1192048"
      },
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        "summary": "SUSE CVE CVE-2021-0935 page",
        "url": "https://www.suse.com/security/cve/CVE-2021-0935/"
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        "url": "https://www.suse.com/security/cve/CVE-2021-20322/"
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    ],
    "title": "Security update for the Linux Kernel (Live Patch 25 for SLE 12 SP5)",
    "tracking": {
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      "generator": {
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      },
      "id": "SUSE-SU-2021:4021-1",
      "initial_release_date": "2021-12-14T08:15:51Z",
      "revision_history": [
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          "number": "1",
          "summary": "Current version"
        }
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  "product_tree": {
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        },
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  "vulnerabilities": [
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      "ids": [
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          "text": "https://www.suse.com/security/cve/CVE-2021-0935"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In ip6_xmit of ip6_output.c, there is a possible out of bounds write due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-168607263References: Upstream kernel",
          "title": "CVE description"
        }
      ],
      "product_status": {
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          "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_98-default-2-2.1.s390x",
          "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_98-default-2-2.1.x86_64"
        ]
      },
      "references": [
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          "summary": "CVE-2021-0935",
          "url": "https://www.suse.com/security/cve/CVE-2021-0935"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1192032 for CVE-2021-0935",
          "url": "https://bugzilla.suse.com/1192032"
        },
        {
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          "summary": "SUSE Bug 1192042 for CVE-2021-0935",
          "url": "https://bugzilla.suse.com/1192042"
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          "summary": "SUSE Bug 1196722 for CVE-2021-0935",
          "url": "https://bugzilla.suse.com/1196722"
        }
      ],
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          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_98-default-2-2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_98-default-2-2.1.s390x",
            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_98-default-2-2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
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            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_98-default-2-2.1.s390x",
            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_98-default-2-2.1.x86_64"
          ]
        }
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          "date": "2021-12-14T08:15:51Z",
          "details": "important"
        }
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      "title": "CVE-2021-0935"
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    {
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          "text": "https://www.suse.com/security/cve/CVE-2021-0941"
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        {
          "category": "general",
          "text": "In bpf_skb_change_head of filter.c, there is a possible out of bounds read due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-154177719References: Upstream kernel",
          "title": "CVE description"
        }
      ],
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          ]
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      ],
      "scores": [
        {
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            "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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            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_98-default-2-2.1.s390x",
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          "text": "https://www.suse.com/security/cve/CVE-2021-20322"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A flaw in the processing of received ICMP errors (ICMP fragment needed and ICMP redirect) in the Linux kernel functionality was found to allow the ability to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypass the source port UDP randomization. The highest threat from this vulnerability is to confidentiality and possibly integrity, because software that relies on UDP source port randomization are indirectly affected as well.",
          "title": "CVE description"
        }
      ],
      "product_status": {
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          "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_98-default-2-2.1.s390x",
          "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_98-default-2-2.1.x86_64"
        ]
      },
      "references": [
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          "category": "external",
          "summary": "CVE-2021-20322",
          "url": "https://www.suse.com/security/cve/CVE-2021-20322"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1191790 for CVE-2021-20322",
          "url": "https://bugzilla.suse.com/1191790"
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        {
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          "summary": "SUSE Bug 1191813 for CVE-2021-20322",
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          "url": "https://bugzilla.suse.com/1193290"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
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            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_98-default-2-2.1.s390x",
            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_98-default-2-2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
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            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_98-default-2-2.1.s390x",
            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_98-default-2-2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2021-12-14T08:15:51Z",
          "details": "important"
        }
      ],
      "title": "CVE-2021-20322"
    }
  ]
}


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