Vulmon
Amazon Linux 2 Security Advisory: ALASKERNEL-5.15-2023-030
Advisory Release Date: 2023-11-09 20:27 Pacific
Advisory Updated Date: 2023-11-15 23:19 Pacific
An issue was discovered in the Linux kernel before 6.5.9, exploitable by local users with userspace access to MMIO registers. Incorrect access checking in the #VC handler and instruction emulation of the SEV-ES emulation of MMIO accesses could lead to arbitrary write access to kernel memory (and thus privilege escalation). This depends on a race condition through which userspace can replace an instruction before the #VC handler reads it. (CVE-2023-46813)
A heap out-of-bounds write vulnerability in the Linux kernel's Linux Kernel Performance Events (perf) component can be exploited to achieve local privilege escalation.
If perf_read_group() is called while an event's sibling_list is smaller than its child's sibling_list, it can increment or write to memory locations outside of the allocated buffer.
We recommend upgrading past commit 32671e3799ca2e4590773fd0e63aaa4229e50c06. (CVE-2023-5717)
Affected Packages:
kernel
This advisory is applicable to Amazon Linux 2 - Kernel-5.15 extra. Visit this page to learn more about Amazon Linux 2 (AL2) Extras and this FAQ section for difference between AL2 core and AL2 extras advisories.
Issue Correction:
Run yum update kernel to update your system.
aarch64:
kernel-5.15.137-91.144.amzn2.aarch64
kernel-headers-5.15.137-91.144.amzn2.aarch64
kernel-debuginfo-common-aarch64-5.15.137-91.144.amzn2.aarch64
perf-5.15.137-91.144.amzn2.aarch64
perf-debuginfo-5.15.137-91.144.amzn2.aarch64
python-perf-5.15.137-91.144.amzn2.aarch64
python-perf-debuginfo-5.15.137-91.144.amzn2.aarch64
kernel-tools-5.15.137-91.144.amzn2.aarch64
kernel-tools-devel-5.15.137-91.144.amzn2.aarch64
kernel-tools-debuginfo-5.15.137-91.144.amzn2.aarch64
bpftool-5.15.137-91.144.amzn2.aarch64
bpftool-debuginfo-5.15.137-91.144.amzn2.aarch64
kernel-devel-5.15.137-91.144.amzn2.aarch64
kernel-debuginfo-5.15.137-91.144.amzn2.aarch64
kernel-livepatch-5.15.137-91.144-1.0-0.amzn2.aarch64
i686:
kernel-headers-5.15.137-91.144.amzn2.i686
src:
kernel-5.15.137-91.144.amzn2.src
x86_64:
kernel-5.15.137-91.144.amzn2.x86_64
kernel-headers-5.15.137-91.144.amzn2.x86_64
kernel-debuginfo-common-x86_64-5.15.137-91.144.amzn2.x86_64
perf-5.15.137-91.144.amzn2.x86_64
perf-debuginfo-5.15.137-91.144.amzn2.x86_64
python-perf-5.15.137-91.144.amzn2.x86_64
python-perf-debuginfo-5.15.137-91.144.amzn2.x86_64
kernel-tools-5.15.137-91.144.amzn2.x86_64
kernel-tools-devel-5.15.137-91.144.amzn2.x86_64
kernel-tools-debuginfo-5.15.137-91.144.amzn2.x86_64
bpftool-5.15.137-91.144.amzn2.x86_64
bpftool-debuginfo-5.15.137-91.144.amzn2.x86_64
kernel-devel-5.15.137-91.144.amzn2.x86_64
kernel-debuginfo-5.15.137-91.144.amzn2.x86_64
kernel-livepatch-5.15.137-91.144-1.0-0.amzn2.x86_64