suse-su-2021:3360-1
Vulnerability from csaf_suse
Published
2021-10-12 12:02
Modified
2021-10-12 12:02
Summary
Security update for the Linux Kernel (Live Patch 0 for SLE 15 SP3)

Notes

Title of the patch
Security update for the Linux Kernel (Live Patch 0 for SLE 15 SP3)
Description of the patch
This update for the Linux Kernel 5.3.18-57 fixes several issues. The following security issues were fixed: - CVE-2021-31440: Fixed a lack of proper validation of user-supplied eBPF programs prior to executing them. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. (bsc#1190127). - CVE-2021-38160: Fixed a bug that could lead to a data corruption or loss. This can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size in drivers/char/virtio_console.c (bsc#1190118) - CVE-2021-3640: Fixed a user-after-free bug in the function sco_sock_sendmsg which could lead to local privilege escalation. (bsc#1188613) - CVE-2021-3573: Fixed a user-after-free bug in the function hci_sock_bound_ioctl which could lead to local privilege escalation. (bsc#1187054).
Patchnames
SUSE-2021-3360,SUSE-SLE-Module-Live-Patching-15-SP3-2021-3360
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 

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    "category": "csaf_security_advisory",
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        "text": "This update for the Linux Kernel 5.3.18-57 fixes several issues.\n\nThe following security issues were fixed:\n\n- CVE-2021-31440: Fixed a lack of proper validation of user-supplied eBPF programs prior to executing them. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. (bsc#1190127).\n- CVE-2021-38160: Fixed a bug that could lead to a data corruption or loss. This can be triggered by an untrusted device that supplies a buf-\u003elen value exceeding the buffer size in drivers/char/virtio_console.c (bsc#1190118)\n- CVE-2021-3640: Fixed a user-after-free bug in the function sco_sock_sendmsg which could lead to local privilege escalation. (bsc#1188613)\n- CVE-2021-3573: Fixed a user-after-free bug in the function hci_sock_bound_ioctl which could lead to local privilege escalation. (bsc#1187054).\n",
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  "vulnerabilities": [
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      "ids": [
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          "text": "https://www.suse.com/security/cve/CVE-2021-31440"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.11.15. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of eBPF programs. The issue results from the lack of proper validation of user-supplied eBPF programs prior to executing them. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. Was ZDI-CAN-13661.",
          "title": "CVE description"
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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": [
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      "scores": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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          "products": [
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      "title": "CVE-2021-31440"
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          "text": "https://www.suse.com/security/cve/CVE-2021-3573"
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        {
          "category": "general",
          "text": "A use-after-free in function hci_sock_bound_ioctl() of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hci_unregister_dev() together with one of the calls hci_sock_blacklist_add(), hci_sock_blacklist_del(), hci_get_conn_info(), hci_get_auth_info(). A privileged local user could use this flaw to crash the system or escalate their privileges on the system. This flaw affects the Linux kernel versions prior to 5.13-rc5.",
          "title": "CVE description"
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        },
        {
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          "summary": "SUSE Bug 1186666 for CVE-2021-3573",
          "url": "https://bugzilla.suse.com/1186666"
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            "version": "3.1"
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    {
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          "text": "https://www.suse.com/security/cve/CVE-2021-3640"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del() together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A privileged local user could use this flaw to crash the system or escalate their privileges on the system.",
          "title": "CVE description"
        }
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      "product_status": {
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          "summary": "SUSE Bug 1188172 for CVE-2021-3640",
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          "summary": "SUSE Bug 1188613 for CVE-2021-3640",
          "url": "https://bugzilla.suse.com/1188613"
        },
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          "summary": "SUSE Bug 1191530 for CVE-2021-3640",
          "url": "https://bugzilla.suse.com/1191530"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1196810 for CVE-2021-3640",
          "url": "https://bugzilla.suse.com/1196810"
        },
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          "category": "external",
          "summary": "SUSE Bug 1196914 for CVE-2021-3640",
          "url": "https://bugzilla.suse.com/1196914"
        }
      ],
      "remediations": [
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          "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 15 SP3:kernel-livepatch-5_3_18-57-default-7-3.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-57-default-7-3.1.x86_64"
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        {
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            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
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            "SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-57-default-7-3.1.s390x",
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          "text": "https://www.suse.com/security/cve/CVE-2021-38160"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss can be triggered by an untrusted device that supplies a buf-\u003elen value exceeding the buffer size. NOTE: the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the length validation was added solely for robustness in the face of anomalous host OS behavior",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
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          "SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-57-default-7-3.1.s390x",
          "SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-57-default-7-3.1.x86_64"
        ]
      },
      "references": [
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          "category": "external",
          "summary": "CVE-2021-38160",
          "url": "https://www.suse.com/security/cve/CVE-2021-38160"
        },
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          "category": "external",
          "summary": "SUSE Bug 1190117 for CVE-2021-38160",
          "url": "https://bugzilla.suse.com/1190117"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1190118 for CVE-2021-38160",
          "url": "https://bugzilla.suse.com/1190118"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1196914 for CVE-2021-38160",
          "url": "https://bugzilla.suse.com/1196914"
        }
      ],
      "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": [
            "SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-57-default-7-3.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-57-default-7-3.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-57-default-7-3.1.x86_64"
          ]
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      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-57-default-7-3.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-57-default-7-3.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-57-default-7-3.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2021-10-12T12:02:15Z",
          "details": "important"
        }
      ],
      "title": "CVE-2021-38160"
    }
  ]
}


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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.