QID 356569

Date Published: 2023-11-09

QID 356569: Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.15-2023-028

A use-after-free vulnerability in the linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. due to a race condition between nf_tables netlink control plane transaction and nft_set element garbage collection, it is possible to underflow the reference counter causing a use-after-free vulnerability. we recommend upgrading past commit 3e91b0ebd994635df2346353322ac51ce84ce6d8. (
( CVE-2023-4244) ipv4: fix null-deref in ipv4_link_failure note: https://www.openwall.com/lists/oss-security/2023/10/02/8 note: https://git.kernel.org/linus/0113d9c9d1ccc07f5a3710dac4aa24b6d711278c (6.6-rc3) (cve-2023-42754) a flaw was found in the netfilter subsystem of the linux kernel.
A race condition between ipset_cmd_add and ipset_cmd_swap can lead to a kernel panic due to the invocation of `__ip_set_put` on a wrong `set`.
This issue may allow a local user to crash the system. (
( CVE-2023-42756) a use-after-free vulnerability in the linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. addition and removal of rules from chain bindings within the same transaction causes leads to use-after-free. we recommend upgrading past commit f15f29fd4779be8a418b66e9d52979bb6d6c2325. (
( CVE-2023-5197)



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.

  • CVSS V3 rated as High - 7 severity.
  • CVSS V2 rated as Medium - 5.4 severity.
    • Solution
    Please refer to Amazon advisory: ALAS2KERNEL-5.15-2023-028 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 356569

    CVE-2023-42756 | CVE-2023-4244 | CVE-2023-42754 | CVE-2023-5197 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS2KERNEL-5.15-2023-028 amazon linux 2 URL Logo alas.aws.amazon.com/AL2/ALASKERNEL-5.15-2023-028.html
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