Buffer overflow in Tats W3m
CVE-2023-4255
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. Explo…
Vulnerability class: Buffer Overflow
EPSS: 0.003 (24.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
Affected products
- Tats W3m — versions 0.5.3\+git20230121-1, 0.5.3\+git20230121-2, 0.5.3\+git20230129
- Fedora Extra Packages For Enterprise Linux
- Fedora
- Fedoraproject Extra_packages_for_enterprise_linux — versions 8.0
- Fedoraproject Fedora — versions 39
- N/a W3m
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Third Party Advisory, Issue Tracking)
- secalert@redhat.com (Patch)
- secalert@redhat.com (Exploit, Patch, Issue Tracking)
- secalert@redhat.com (Patch, Issue Tracking)
- secalert@redhat.com
- secalert@redhat.com
- secalert@redhat.com
Frequently asked questions
- What is CVE-2023-4255?
- CVE-2023-4255 is a medium-severity vulnerability in Tats W3m, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2023-12-21.
- How severe is CVE-2023-4255?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2023-4255 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.