QID 356612

Date Published: 2023-11-09

QID 356612: Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.10-2023-042

An issue was discovered in drivers/mtd/ubi/cdev.c in the linux kernel 6.2.
There is a divide-by-zero error in do_div(sz,mtd->erasesize), used indirectly by ctrl_cdev_ioctl, when mtd->erasesize is 0. (
( CVE-2023-31085) a flaw in the kernel xen event handler can cause a deadlock with xen console handling in unprivileged xen guests. (
( CVE-2023-34324) 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 stack based out-of-bounds write flaw was found in the netfilter subsystem in the linux kernel.
If the expression length is a multiple of 4 (register size), the `nft_exthdr_eval` family of functions writes 4 null bytes past the end of the `regs` argument, leading to stack corruption and potential information disclosure or a denial of service. (
( CVE-2023-4881)

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-5.10-2023-042 for affected packages and patching details, or update with your package manager.

Vendor References

ALAS2KERNEL-5.10-2023-042 - alas.aws.amazon.com/AL2/ALASKERNEL-5.10-2023-042.html

CVEs related to QID 356612

CVE-2023-4244 | CVE-2023-31085 | CVE-2023-34324 | CVE-2023-42754 |

Software Advisories

Advisory ID	Software	Component	Link
ALAS2KERNEL-5.10-2023-042	amazon linux 2		alas.aws.amazon.com/AL2/ALASKERNEL-5.10-2023-042.html

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