VulnerabilityModified
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.
MEDIUM 5.5EPSS 0.32%
Does this matter?
Lower severity and a low EPSS score (0.32%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 0.32% probability · 25th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- tats/w3m · fedoraproject/extra packages for enterprise linux · fedoraproject/fedora
- Source
- secalert@redhat.com
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2255207Issue Tracking, Third Party Advisory
- https://github.com/tats/w3m/commit/edc602651c506aeeb60544b55534dd1722a340d3Patch
- https://github.com/tats/w3m/issues/268Exploit, Issue Tracking, Patch
- https://github.com/tats/w3m/pull/273Issue Tracking, Patch
- 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/
- https://bugzilla.redhat.com/show_bug.cgi?id=2255207Issue Tracking, Third Party Advisory
- https://github.com/tats/w3m/commit/edc602651c506aeeb60544b55534dd1722a340d3Patch
- https://github.com/tats/w3m/issues/268Exploit, Issue Tracking, Patch
- https://github.com/tats/w3m/pull/273Issue Tracking, Patch
- 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/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.