CVE-2025-34457

Name	CVE-2025-34457
Description	wb2osz/direwolf (Dire Wolf) versions up to and including 1.8, prior to commit 694c954, contain a stack-based buffer overflow vulnerability in the function kiss_rec_byte() located in src/kiss_frame.c. When processing crafted KISS frames that reach the maximum allowed frame length (MAX_KISS_LEN), the function appends a terminating FEND byte without reserving sufficient space in the stack buffer. This results in an out-of-bounds write followed by an out-of-bounds read during the subsequent call to kiss_unwrap(), leading to stack memory corruption or application crashes. This vulnerability may allow remote unauthenticated attackers to trigger a denial-of-service condition.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1123925

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
direwolf (PTS)	bullseye	1.6+dfsg-1	vulnerable
	bookworm	1.6+dfsg-3	vulnerable
	trixie	1.7+dfsg-2	vulnerable
	forky, sid	1.8.1+dfsg-1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
direwolf	source	(unstable)	(unfixed)			1123925

Notes

[trixie] - direwolf <no-dsa> (Minor issue)
[bookworm] - direwolf <no-dsa> (Minor issue)
https://github.com/wb2osz/direwolf/issues/617
Fixed by: https://github.com/wb2osz/direwolf/commit/694c95485b21c1c22bc4682703771dec4d7a374b (dev)