Home/CVE/An out-of-bounds write issue has been discovered in the backspace handling of the checkType() function in etc.c within t
CVE

CVE-2023-4255

An out-of-bounds write issue has been discovered in the backspace handling of the checkType() function in etc.c within t

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.

MEDIUM · CVSS 5.5 EPSS 0.00021
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-787Out-of-bounds Write
CWE-787Out-of-bounds Write
▤

Affected Products & Versions

3
tats w3mall versions
fedoraproject extra packages for enterprise linuxall versions
fedoraproject fedoraall versions
⚠

Public Exploits & PoCs

1
pocgithub.com · issues/268github.com
▣

Scoring & Timeline

5.5
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD21 Dec 2023 · 04:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

2
usnUSN-6580-1
suse-csafSUSE-SU-2024:0014-1
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.redhat.com/show_bug.cgi?id=2255207Issue TrackingThird Party Advisory
https://github.com/tats/w3m/commit/edc602651c506aeeb60544b55534dd1722a340d3Patch
https://github.com/tats/w3m/pull/273Issue TrackingPatch
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AULOBQJLXE2KCT5UVQMKGEFL4GFIAOED/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MKFZQUK7FPWWJQYICDZZ4YWIPUPQ2D3R/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TODROGVCWZ435HQIZE6ARQC5LPQLIA5C/
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