Vulmon
Amazon Linux 2 Security Advisory: ALASLIVEPATCH-2023-147
Advisory Release Date: 2023-09-14 01:05 Pacific
Advisory Updated Date: 2023-09-25 22:10 Pacific
A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation.
If tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.
We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc. (CVE-2023-3609)
A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation.
If tcf_change_indev() fails, fw_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.
We recommend upgrading past commit 0323bce598eea038714f941ce2b22541c46d488f. (CVE-2023-3776)
Affected Packages:
kernel-livepatch-4.14.318-241.531
Issue Correction:
Please ensure you have live patching enabled.
Run yum update kernel-livepatch-4.14.318-241.531 to update your system.
src:
kernel-livepatch-4.14.318-241.531-1.0-1.amzn2.src
x86_64:
kernel-livepatch-4.14.318-241.531-1.0-1.amzn2.x86_64
kernel-livepatch-4.14.318-241.531-debuginfo-1.0-1.amzn2.x86_64