CVE-2023-4255

W3m: out-of-bounds write in function checktype() in etc.c (incomplete fix for cve-2022-38223)

An out-of-bounds write issue has been discovered in the backspace handling of the checkType() function in etc.c within the W3M application. This vulnerability is triggered by supplying a specially crafted HTML file to the w3m binary. Exploitation of this flaw could lead to application crashes, resulting in a denial of service condition.

Affected

Fedora · w3m · Extra Packages for Enterprise Linux

CVSS v3.1 NVD

5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS

0.32% chance of exploitation in the next 30 days, 24th percentile

Published

2023-12-21

Updated

2025-02-13

Proof-of-concept exploits (1)

• tats/w3m/issues/2681084★ · 2024-08-19

Security advisories

• https://bugzilla.redhat.com/show_bug.cgi?id=2255207

References

• CVE Record
• NVD entry

Related

• CVE-2022-38223
• CVE-2023-38252
• CVE-2023-38253