CVE-2023-25564

Name	CVE-2023-25564
Description	GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, memory corruption can be triggered when decoding UTF16 strings. The variable `outlen` was not initialized and could cause writing a zero to an arbitrary place in memory if `ntlm_str_convert()` were to fail, which would leave `outlen` uninitialized. This can lead to a denial of service if the write hits unmapped memory or randomly corrupts a byte in the application memory space. This vulnerability can trigger an out-of-bounds write, leading to memory corruption. This vulnerability can be triggered via the main `gss_accept_sec_context` entry point. This issue is fixed in version 1.2.0.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1031369

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
gss-ntlmssp (PTS)	buster, bullseye	0.7.0-4	fixed
	bookworm, sid, trixie	1.2.0-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Debian Bugs
gss-ntlmssp	source	buster	(not affected)
gss-ntlmssp	source	bullseye	(not affected)
gss-ntlmssp	source	(unstable)	1.2.0-1	1031369

Notes

[bullseye] - gss-ntlmssp <not-affected> (Vulnerable code not present)
[buster] - gss-ntlmssp <not-affected> (Vulnerable code not present)
https://github.com/gssapi/gss-ntlmssp/security/advisories/GHSA-r85x-q5px-9xfq
https://github.com/gssapi/gss-ntlmssp/commit/c753000eb31835c0664e528fbc99378ae0cbe950 (v1.2.0)