| Name | CVE-2023-4255 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1059265 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| w3m (PTS) | jessie, jessie (lts) | 0.5.3-19+deb8u4 | vulnerable |
| stretch (lts), stretch | 0.5.3-34+deb9u2 | vulnerable |
| buster | 0.5.3-37 | vulnerable |
| buster (security) | 0.5.3-37+deb10u1 | vulnerable |
| bullseye | 0.5.3+git20210102-6+deb11u1 | vulnerable |
| sid, trixie, bookworm | 0.5.3+git20230121-2 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| w3m | source | (unstable) | (unfixed) | | | 1059265 |
Notes
[bookworm] - w3m <no-dsa> (Minor issue)
[bullseye] - w3m <no-dsa> (Minor issue)
[buster] - w3m <no-dsa> (Minor issue)
https://github.com/tats/w3m/commit/edc602651c506aeeb60544b55534dd1722a340d3
https://github.com/tats/w3m/issues/268
https://github.com/tats/w3m/pull/273
[stretch] - w3m <postponed> (Minor issue, OOB read)
[jessie] - w3m <postponed> (Minor issue, OOB read)