CVE-2023-53372: linux kernel Memory Corruption — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: sctp: fix a potential overflow in sctp_ifwdtsn_skip Currently, when traversing ifwdtsn skips with _sctp_walk_ifwdtsn, it only checks the pos against the end of the chunk. However, the data left for the last pos may be < sizeof(struct sctp_ifwdtsn_skip), and dereference it as struct sctp_ifwdtsn_skip may cause coverflow. This patch fixes it by checking the pos against "the end of the chunk - sizeof(struct sctp_ifwdtsn_skip)" in sctp_ifwdtsn_skip, similar to sctp_fwdtsn_skip.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.16 — 4.19.281
linux	linux_kernel	4.20 — 5.4.241
linux	linux_kernel	5.5 — 5.10.178
linux	linux_kernel	5.11 — 5.15.108
linux	linux_kernel	5.16 — 6.1.25
linux	linux_kernel	6.2 — 6.2.12
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/32832a2caf82663870126c5186cf8f86c8b2a649 https://git.kernel.org/stable/c/4fbd094d4131a10d06a45d64158567052a35b3f4 https://git.kernel.org/stable/c/5c9367ac5a22d71841bcd00130f9146c9b227d57 https://git.kernel.org/stable/c/6109f5b13ce3e3e537db6f18976ec0e9118d1c6f https://git.kernel.org/stable/c/79b28f42214a3d0d6a8c514db3602260bd5d6cb5 https://git.kernel.org/stable/c/ad831a7079c99c01e801764b53bc9997c2e9c0f7 https://git.kernel.org/stable/c/ad988e9b5ff04607e624a459209e8c2d0c15fc73

Frequently Asked Questions

What is CVE-2023-53372? +

In the Linux kernel, the following vulnerability has been resolved: sctp: fix a potential overflow in sctp_ifwdtsn_skip Currently, when traversing ifwdtsn skips with _sctp_walk_ifwdtsn, it only checks the pos against the end of the chunk. However, the data left for the last pos may be < sizeof(struct sctp_ifwdtsn_skip), and dereference it as struct sctp_ifwdtsn_skip may cause coverflow. This patch fixes it by checking the pos against "the end of the chunk - sizeof(struct sctp_ifwdtsn_skip)" in sctp_ifwdtsn_skip, similar to sctp_fwdtsn_skip. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-53372? +

CVE-2023-53372 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2023-53372? +

CVE-2023-53372 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-53372? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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