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CVE-2023-4255

Date: December 21, 2023

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.

Language: C

Severity Score

Related Resources (10)

https://security-tracker.debian.org/tracker/CVE-2023-4255
https://github.com/tats/w3m/issues/268
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TODROGVCWZ435HQIZE6ARQC5LPQLIA5C/
https://github.com/tats/w3m/commit/edc602651c506aeeb60544b55534dd1722a340d3
https://github.com/tats/w3m/pull/273
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AULOBQJLXE2KCT5UVQMKGEFL4GFIAOED/
https://nvd.nist.gov/vuln/detail/CVE-2023-4255
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MKFZQUK7FPWWJQYICDZZ4YWIPUPQ2D3R/
https://bugzilla.redhat.com/show_bug.cgi?id=2255207
https://www.mend.io/vulnerability-database/CVE-2023-4255

Severity Score

Weakness Type (CWE)

Out-of-bounds Write

CWE-787

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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