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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.

PUBLISHED Reserved 2025-04-15 | Published 2025-12-22 | Updated 2025-12-23 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-121 Stack-based Buffer Overflow

Product status

Default status
unaffected

Any version
affected

commit 694c954 (custom)
unaffected

Credits

Vlatko Kosturjak with Marlink Cyber finder

References

github.com/...0-direwolf-stack-buffer-overflow-kiss-frame.md technical-description exploit

github.com/wb2osz/direwolf/issues/617 issue-tracking

github.com/wb2osz/direwolf/commit/694c954 patch

www.vulncheck.com/...irewolf-stack-based-buffer-overflow-dos third-party-advisory

cve.org (CVE-2025-34457)

nvd.nist.gov (CVE-2025-34457)

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Data based on CVE®. Copyright © 1999-2025, The MITRE Corporation. All rights reserved.