Security update for the Linux Kernel

SUSE Security Update: Security update for the Linux Kernel
Announcement ID: SUSE-SU-2021:14764-1
Rating: important
References: #1184081 #1184391 #1184611 #1185859 #1185861 #1185862 #1185863 #1186062 #1187038 #1187452 #1187595
Cross-References:CVE-2020-24586 CVE-2020-24587 CVE-2020-24588 CVE-2020-26139 CVE-2020-36386 CVE-2021-0512 CVE-2021-29154 CVE-2021-32399 CVE-2021-34693
Affected Products:
  • SUSE Linux Enterprise Server 11-SP4-LTSS
  • SUSE Linux Enterprise Server 11-EXTRA
  • SUSE Linux Enterprise Debuginfo 11-SP4

An update that solves 9 vulnerabilities and has two fixes is now available.

Description:


The SUSE Linux Enterprise 11 SP4 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

  • CVE-2021-0512: Fixed a possible out of bounds write due to a heap buffer overflow in __hidinput_change_resolution_multipliers. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. (bsc#1187595)
  • CVE-2021-34693: Fixed a bug in net/can/bcm.c which could allow local users to obtain sensitive information from kernel stack memory because parts of a data structure are uninitialized. (bsc#1187452)
  • CVE-2020-36386: Fixed an out-of-bounds read in hci_extended_inquiry_result_evt. (bsc#1187038)
  • CVE-2020-24588: Fixed a bug that could allow an adversary to abuse devices that support receiving non-SSP A-MSDU frames to inject arbitrary network packets. (bsc#1185861 bsc#1185863)
  • CVE-2021-29154: Fixed an incorrect computation of branch displacements in the BPF JIT compilers, which could allow to execute arbitrary code within the kernel context. (bsc#1184391)
  • CVE-2021-32399: Fixed a race condition in net/bluetooth/hci_request.c for removal of the HCI controller. (bsc#1184611)
  • CVE-2020-24586: Fixed a bug that, under the right circumstances, allows to inject arbitrary network packets and/or exfiltrate user data when another device sends fragmented frames encrypted using WEP, CCMP, or GCMP. (bsc#1185859 bsc#1185863)
  • CVE-2020-26139: Fixed a bug that allows an Access Point (AP) to forward EAPOL frames to other clients even though the sender has not yet successfully authenticated. This might be abused in projected Wi-Fi networks to launch denial-of-service attacks against connected clients and made it easier to exploit other vulnerabilities in connected clients. (bsc#1185863 bsc#1186062)
  • CVE-2020-24587: Fixed a bug that allows an adversary to decrypt selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP encryption key is periodically renewed. (bsc#1185862 bsc#1185863)

The following non-security bugs were fixed:
  • md: do not flush workqueue unconditionally in md_open (bsc#1184081).
  • md: factor out a mddev_find_locked helper from mddev_find (bsc#1184081).
  • md: md_open returns -EBUSY when entering racing area (bsc#1184081).
  • md: split mddev_find (bsc#1184081).

Special Instructions and Notes:

Please reboot the system after installing this update.

Patch Instructions:

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

  • SUSE Linux Enterprise Server 11-SP4-LTSS:
    zypper in -t patch slessp4-kernel-source-14764=1
  • SUSE Linux Enterprise Server 11-EXTRA:
    zypper in -t patch slexsp3-kernel-source-14764=1
  • SUSE Linux Enterprise Debuginfo 11-SP4:
    zypper in -t patch dbgsp4-kernel-source-14764=1

Package List:

  • SUSE Linux Enterprise Server 11-SP4-LTSS (i586 ppc64 s390x x86_64):
    • kernel-default-3.0.101-108.129.1
    • kernel-default-base-3.0.101-108.129.1
    • kernel-default-devel-3.0.101-108.129.1
    • kernel-source-3.0.101-108.129.1
    • kernel-syms-3.0.101-108.129.1
    • kernel-trace-3.0.101-108.129.1
    • kernel-trace-base-3.0.101-108.129.1
    • kernel-trace-devel-3.0.101-108.129.1
  • SUSE Linux Enterprise Server 11-SP4-LTSS (i586 x86_64):
    • kernel-ec2-3.0.101-108.129.1
    • kernel-ec2-base-3.0.101-108.129.1
    • kernel-ec2-devel-3.0.101-108.129.1
    • kernel-xen-3.0.101-108.129.1
    • kernel-xen-base-3.0.101-108.129.1
    • kernel-xen-devel-3.0.101-108.129.1
  • SUSE Linux Enterprise Server 11-SP4-LTSS (ppc64):
    • kernel-bigmem-3.0.101-108.129.1
    • kernel-bigmem-base-3.0.101-108.129.1
    • kernel-bigmem-devel-3.0.101-108.129.1
    • kernel-ppc64-3.0.101-108.129.1
    • kernel-ppc64-base-3.0.101-108.129.1
    • kernel-ppc64-devel-3.0.101-108.129.1
  • SUSE Linux Enterprise Server 11-SP4-LTSS (s390x):
    • kernel-default-man-3.0.101-108.129.1
  • SUSE Linux Enterprise Server 11-SP4-LTSS (i586):
    • kernel-pae-3.0.101-108.129.1
    • kernel-pae-base-3.0.101-108.129.1
    • kernel-pae-devel-3.0.101-108.129.1
  • SUSE Linux Enterprise Server 11-EXTRA (i586 ia64 ppc64 s390x x86_64):
    • kernel-default-extra-3.0.101-108.129.1
  • SUSE Linux Enterprise Server 11-EXTRA (i586 x86_64):
    • kernel-xen-extra-3.0.101-108.129.1
  • SUSE Linux Enterprise Server 11-EXTRA (x86_64):
    • kernel-trace-extra-3.0.101-108.129.1
  • SUSE Linux Enterprise Server 11-EXTRA (ppc64):
    • kernel-ppc64-extra-3.0.101-108.129.1
  • SUSE Linux Enterprise Server 11-EXTRA (i586):
    • kernel-pae-extra-3.0.101-108.129.1
  • SUSE Linux Enterprise Debuginfo 11-SP4 (i586 ppc64 s390x x86_64):
    • kernel-default-debuginfo-3.0.101-108.129.1
    • kernel-default-debugsource-3.0.101-108.129.1
    • kernel-trace-debuginfo-3.0.101-108.129.1
    • kernel-trace-debugsource-3.0.101-108.129.1
  • SUSE Linux Enterprise Debuginfo 11-SP4 (i586 s390x x86_64):
    • kernel-default-devel-debuginfo-3.0.101-108.129.1
    • kernel-trace-devel-debuginfo-3.0.101-108.129.1
  • SUSE Linux Enterprise Debuginfo 11-SP4 (i586 x86_64):
    • kernel-ec2-debuginfo-3.0.101-108.129.1
    • kernel-ec2-debugsource-3.0.101-108.129.1
    • kernel-xen-debuginfo-3.0.101-108.129.1
    • kernel-xen-debugsource-3.0.101-108.129.1
    • kernel-xen-devel-debuginfo-3.0.101-108.129.1
  • SUSE Linux Enterprise Debuginfo 11-SP4 (ppc64):
    • kernel-bigmem-debuginfo-3.0.101-108.129.1
    • kernel-bigmem-debugsource-3.0.101-108.129.1
    • kernel-ppc64-debuginfo-3.0.101-108.129.1
    • kernel-ppc64-debugsource-3.0.101-108.129.1
  • SUSE Linux Enterprise Debuginfo 11-SP4 (i586):
    • kernel-pae-debuginfo-3.0.101-108.129.1
    • kernel-pae-debugsource-3.0.101-108.129.1
    • kernel-pae-devel-debuginfo-3.0.101-108.129.1

References: