| Name | CVE-2021-40647 |
| Description | In man2html 1.6g, a specific string being read in from a file will overwrite the size parameter in the top chunk of the heap. This at least causes the program to segmentation abort if the heap size parameter isn't aligned correctly. In version before GLIBC version 2.29 and aligned correctly, it allows arbitrary write anywhere in the programs memory. |
| 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 | 1021738 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| man2html (PTS) | jessie | 1.6g-7 | vulnerable |
| stretch | 1.6g-9 | vulnerable |
| buster | 1.6g-11 | vulnerable |
| bullseye, bookworm | 1.6g-14 | vulnerable |
| sid, trixie | 1.6g-16 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| man2html | source | jessie | (unfixed) | end-of-life | | |
| man2html | source | stretch | (unfixed) | end-of-life | | |
| man2html | source | (unstable) | 1.6g-16 | | | 1021738 |
Notes
[bookworm] - man2html <no-dsa> (Minor issue)
[bullseye] - man2html <no-dsa> (Minor issue)
[buster] - man2html <no-dsa> (Minor issue)
https://gist.github.com/untaman/cb58123fe89fc65e3984165db5d40933