Security update for the Linux Kernel (Live Patch 0 for SLE 15 SP3)

Announcement ID: SUSE-SU-2021:3360-1
Rating: important
References:
Cross-References:
CVSS scores:
  • CVE-2021-31440 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE-2021-31440 ( NVD ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE-2021-31440 ( NVD ): 8.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
  • CVE-2021-3573 ( SUSE ): 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • CVE-2021-3573 ( NVD ): 6.4 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
  • CVE-2021-3640 ( SUSE ): 7.4 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  • CVE-2021-3640 ( NVD ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE-2021-38160 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE-2021-38160 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products:
  • openSUSE Leap 15.3
  • SUSE Linux Enterprise High Performance Computing 15 SP3
  • SUSE Linux Enterprise Live Patching 15-SP3
  • SUSE Linux Enterprise Micro 5.1
  • SUSE Linux Enterprise Micro 5.2
  • SUSE Linux Enterprise Server 15 SP3
  • SUSE Linux Enterprise Server for SAP Applications 15 SP3

An update that solves four vulnerabilities can now be installed.

Description:

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).

Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

  • openSUSE Leap 15.3
    zypper in -t patch SUSE-2021-3360=1
  • SUSE Linux Enterprise Live Patching 15-SP3
    zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP3-2021-3360=1

Package List:

  • openSUSE Leap 15.3 (ppc64le s390x x86_64)
    • kernel-livepatch-5_3_18-57-default-debuginfo-7-3.1
    • kernel-livepatch-SLE15-SP3_Update_0-debugsource-7-3.1
    • kernel-livepatch-5_3_18-57-default-7-3.1
  • openSUSE Leap 15.3 (x86_64)
    • kernel-livepatch-5_3_18-57-preempt-debuginfo-7-3.1
    • kernel-livepatch-5_3_18-57-preempt-7-3.1
  • SUSE Linux Enterprise Live Patching 15-SP3 (ppc64le s390x x86_64)
    • kernel-livepatch-5_3_18-57-default-debuginfo-7-3.1
    • kernel-livepatch-SLE15-SP3_Update_0-debugsource-7-3.1
    • kernel-livepatch-5_3_18-57-default-7-3.1

References: