CVE-2023-5941

libc stdio buffer overflow

Description

In versions of FreeBSD 12.4-RELEASE prior to 12.4-RELEASE-p7 and FreeBSD 13.2-RELEASE prior to 13.2-RELEASE-p5 the __sflush() stdio function in libc does not correctly update FILE objects' write space members for write-buffered streams when the write(2) system call returns an error.  Depending on the nature of an application that calls libc's stdio functions and the presence of errors returned from the write(2) system call (or an overridden stdio write routine) a heap buffer overflow may occur. Such overflows may lead to data corruption or the execution of arbitrary code at the privilege level of the calling program.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.51%
Vendor Advisory freebsd.org
Affected: FreeBSD FreeBSD
Published at:
Updated at:

References

Link Tags
https://security.freebsd.org/advisories/FreeBSD-SA-23:15.stdio.asc vendor advisory
https://security.netapp.com/advisory/ntap-20231214-0004/

Frequently Asked Questions

What is the severity of CVE-2023-5941?
CVE-2023-5941 has been scored as a critical severity vulnerability.
How to fix CVE-2023-5941?
To fix CVE-2023-5941, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-5941 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-5941 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-5941?
CVE-2023-5941 affects FreeBSD FreeBSD.
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