W3m: out-of-bounds write in function checktype() in etc.c (incomplete fix for cve-2022-38223)
CVE-2023-4255

5.5MEDIUM

Key Information:

Vendor

Fedora

Status
W3m
Fedora
Extra Packages For Enterprise Linux
Vendor
CVE Published:
21 December 2023

What is 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. Exploitation of this flaw could lead to application crashes, resulting in a denial of service condition.

References

https://bugzilla.redhat.com/show_bug.cgi?id=2255207
issue-trackingx_refsource_REDHAT
https://github.com/tats/w3m/commit/edc602651c506aeeb60544...
https://github.com/tats/w3m/issues/268

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank [email protected] for reporting this issue.
.