Vulnerability Details : CVE-2023-4255
Potential exploit
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.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2023-4255
- cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
- cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:a:tats:w3m:0.5.3\+git20230121-1:*:*:*:*:*:*:*
- cpe:2.3:a:tats:w3m:0.5.3\+git20230121-2:*:*:*:*:*:*:*
- cpe:2.3:a:tats:w3m:0.5.3\+git20230129:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-4255
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 20 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-4255
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST | 2024-01-03 |
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
Red Hat, Inc. |
CWE ids for CVE-2023-4255
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
References for CVE-2023-4255
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TODROGVCWZ435HQIZE6ARQC5LPQLIA5C/
[SECURITY] Fedora 39 Update: w3m-0.5.3-63.git20230121.fc39 - package-announce - Fedora Mailing-Lists
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MKFZQUK7FPWWJQYICDZZ4YWIPUPQ2D3R/
[SECURITY] Fedora 38 Update: w3m-0.5.3-63.git20230121.fc38 - package-announce - Fedora Mailing-Lists
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AULOBQJLXE2KCT5UVQMKGEFL4GFIAOED/
[SECURITY] Fedora 40 Update: w3m-0.5.3-63.git20230121.fc40 - package-announce - Fedora Mailing-Lists
-
https://github.com/tats/w3m/commit/edc602651c506aeeb60544b55534dd1722a340d3
Fix OOB access due to multiple backspaces · tats/w3m@edc6026 · GitHubPatch
-
https://github.com/tats/w3m/issues/268
Incomplete fix for CVE-2022-38223 · Issue #268 · tats/w3m · GitHubExploit;Issue Tracking;Patch
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https://bugzilla.redhat.com/show_bug.cgi?id=2255207
2255207 – (CVE-2023-4255) CVE-2023-4255 w3m: out-of-bounds write in function checkType() in etc.c (incomplete fix for CVE-2022-38223)Issue Tracking;Third Party Advisory
-
https://github.com/tats/w3m/pull/273
Fix OOB access due to multiple backspaces by rkta · Pull Request #273 · tats/w3m · GitHubIssue Tracking;Patch
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