Linux · Amazon Linux · Security advisory · February 17, 2023

ALAS2023-2023-020: Security update for 24 packages

ALAS2023-2023-020, released February 17, 2023, fixes 10 CVEs across 24 products. None of them is reported as exploited. Patch Radar priority: Urgent.

Urgent
CVEs closed
10
1 rated Critical
Exploited
0
None reported
Highest CVSS
8.6
Base score, 0 to 10
Highest EPSS
0.0127
70th percentile

Priority of the 10 CVEs

Patch now 0 Urgent 1 High 8 Routine 1

Fixed package versions

ProductReleaseFixed in
grub2-commonamzn 20231:2.06-61.amzn2023.0.3
grub2-debuginfoamzn 20231:2.06-61.amzn2023.0.3
grub2-debugsourceamzn 20231:2.06-61.amzn2023.0.3
grub2-efi-aa64amzn 20231:2.06-61.amzn2023.0.3
grub2-efi-aa64-cdbootamzn 20231:2.06-61.amzn2023.0.3
grub2-efi-aa64-ec2amzn 20231:2.06-61.amzn2023.0.3
grub2-efi-aa64-modulesamzn 20231:2.06-61.amzn2023.0.3
grub2-efi-x64amzn 20231:2.06-61.amzn2023.0.3
grub2-efi-x64-cdbootamzn 20231:2.06-61.amzn2023.0.3
grub2-efi-x64-ec2amzn 20231:2.06-61.amzn2023.0.3
grub2-efi-x64-modulesamzn 20231:2.06-61.amzn2023.0.3
grub2-emuamzn 20231:2.06-61.amzn2023.0.3
grub2-emu-debuginfoamzn 20231:2.06-61.amzn2023.0.3
grub2-emu-modulesamzn 20231:2.06-61.amzn2023.0.3
grub2-pcamzn 20231:2.06-61.amzn2023.0.3
grub2-pc-modulesamzn 20231:2.06-61.amzn2023.0.3
grub2-toolsamzn 20231:2.06-61.amzn2023.0.3
grub2-tools-debuginfoamzn 20231:2.06-61.amzn2023.0.3
grub2-tools-efiamzn 20231:2.06-61.amzn2023.0.3
grub2-tools-efi-debuginfoamzn 20231:2.06-61.amzn2023.0.3
grub2-tools-extraamzn 20231:2.06-61.amzn2023.0.3
grub2-tools-extra-debuginfoamzn 20231:2.06-61.amzn2023.0.3
grub2-tools-minimalamzn 20231:2.06-61.amzn2023.0.3
grub2-tools-minimal-debuginfoamzn 20231:2.06-61.amzn2023.0.3

CVEs this fix closes

PriorityCVETitleCVSSEPSSExploitation
Urgent CVE-2022-3775 Redhat: CVE-2022-3775 grub2 - Heap based out-of-bounds write when rendering certain Unicode sequences8.2 0.0104 Exploitation Less Likely
High CVE-2022-28733 grub-efi-amd64: Integer underflow in grub_net_recv_ip4_packets; A malicious crafted IP packet can lead to an integer underflow in gru...8.1 0.0127 None reported
High CVE-2022-28734 grub2-common: The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable...8.1 0.0112 None reported
High CVE-2022-2601 Redhat: CVE-2022-2601 grub2 - Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass8.6 0.0052 Exploitation Less Likely
High CVE-2021-3696 grub2-common: The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable...8.1 0.0048 None reported
High CVE-2021-3695 grub2-common: The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable...8.1 0.0048 None reported
High CVE-2021-3697 grub2-common: The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable...8.1 0.0047 None reported
High CVE-2022-28735 grub-efi-arm64: The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems8.1 0.0032 None reported
High CVE-2022-28736 grub-efi-arm64: There's a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up...8.1 0.0029 None reported
Routine CVE-2021-3981 grub2-common: The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable...3.3 0.0032 None reported
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