by Kastro
Paper/Archive/CVE-2023-5941

CVE-2023-5941

FreeBSD FreeBSD — libc stdio buffer overflow

EPSS 1%CVSS 9.8
critical.is priorityof 100
42
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 64.9.649 × 2013.0No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
FreeBSD12.4-RELEASE – < p7p7CNA
FreeBSD13.2-RELEASE – < p5p5CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

advisorysecurity.freebsd.org/advisories/FreeBSD-SA-23:15.stdio.ascrefsecurity.netapp.com/advisory/ntap-20231214-0004