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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | man2html | 1.6g-16 | — |
| Debian 13 | man2html | 1.6g-16 | — |
| Debian 12 | man2html | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | man2html | No fix yet | — |
| Ubuntu 26.04 LTS | man2html | No fix yet | — |
| Ubuntu 25.10 | man2html | No fix yet | — |
| Ubuntu 24.04 LTS | man2html | No fix yet | — |
| Ubuntu 22.04 LTS | man2html | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | man2html | No fix yet | — |
| Ubuntu 18.04 LTS | man2html | No fix yet | — |
| Ubuntu 16.04 LTS | man2html | No fix yet | — |