Security update for grub2

Announcement ID: SUSE-SU-2022:2039-1
Rating: important
References:
Cross-References:
CVSS scores:
  • CVE-2021-3695 ( SUSE ): 7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
  • CVE-2021-3695 ( NVD ): 4.5 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
  • CVE-2021-3696 ( SUSE ): 5.0 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L
  • CVE-2021-3696 ( NVD ): 4.5 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
  • CVE-2021-3697 ( SUSE ): 7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
  • CVE-2021-3697 ( NVD ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE-2022-28733 ( SUSE ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  • CVE-2022-28733 ( NVD ): 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  • CVE-2022-28734 ( SUSE ): 7.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
  • CVE-2022-28734 ( NVD ): 7.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
  • CVE-2022-28736 ( SUSE ): 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • CVE-2022-28736 ( NVD ): 6.4 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Affected Products:
  • SUSE Linux Enterprise High Performance Computing 12 SP2
  • SUSE Linux Enterprise Server 12 SP2
  • SUSE Linux Enterprise Server 12 SP2 BCL 12-SP2

An update that solves six vulnerabilities and has two security fixes can now be installed.

Description:

This update for grub2 fixes the following issues:

Security fixes and hardenings for boothole 3 / boothole 2022 (bsc#1198581)

  • CVE-2021-3695: Fixed that a crafted PNG grayscale image could lead to out-of-bounds write in heap (bsc#1191184)
  • CVE-2021-3696: Fixed that a crafted PNG image could lead to out-of-bound write during huffman table handling (bsc#1191185)
  • CVE-2021-3697: Fixed that a crafted JPEG image could lead to buffer underflow write in the heap (bsc#1191186)
  • CVE-2022-28733: Fixed fragmentation math in net/ip (bsc#1198460)
  • CVE-2022-28734: Fixed an out-of-bound write for split http headers (bsc#1198493)
  • CVE-2022-28736: Fixed a use-after-free in chainloader command (bsc#1198496)
  • Update SBAT security contact (bsc#1193282)
  • Bump grub's SBAT generation to 2

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:

  • SUSE Linux Enterprise Server 12 SP2 BCL 12-SP2
    zypper in -t patch SUSE-SLE-SERVER-12-SP2-BCL-2022-2039=1

Package List:

  • SUSE Linux Enterprise Server 12 SP2 BCL 12-SP2 (x86_64)
    • grub2-debugsource-2.02-115.67.2
    • grub2-debuginfo-2.02-115.67.2
    • grub2-x86_64-efi-2.02-115.67.2
    • grub2-x86_64-xen-2.02-115.67.2
    • grub2-2.02-115.67.2
    • grub2-i386-pc-2.02-115.67.2
  • SUSE Linux Enterprise Server 12 SP2 BCL 12-SP2 (noarch)
    • grub2-snapper-plugin-2.02-115.67.2
    • grub2-systemd-sleep-plugin-2.02-115.67.2

References: