CVE-2023-4255
W3m: out-of-bounds write in function checktype() in etc.c (incomplete fix for cve-2022-38223)
CVSS Score
5.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-787 |
| Vendor | n/a |
| Product | w3m |
| Published | Dec 21, 2023 |
| Last Updated | Feb 13, 2025 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
n/a / w3m
All versions affected Fedora / Fedora
All versions affected Fedora / Extra Packages for Enterprise Linux
All versions affected References
bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2255207 github.com: https://github.com/tats/w3m/commit/edc602651c506aeeb60544b55534dd1722a340d3 github.com: https://github.com/tats/w3m/issues/268 github.com: https://github.com/tats/w3m/pull/273 lists.fedoraproject.org: https://lists.fedoraproject.org/archives/list/[email protected]/message/AULOBQJLXE2KCT5UVQMKGEFL4GFIAOED/ lists.fedoraproject.org: https://lists.fedoraproject.org/archives/list/[email protected]/message/TODROGVCWZ435HQIZE6ARQC5LPQLIA5C/ lists.fedoraproject.org: https://lists.fedoraproject.org/archives/list/[email protected]/message/MKFZQUK7FPWWJQYICDZZ4YWIPUPQ2D3R/
Credits
Red Hat would like to thank [email protected] for reporting this issue.