Description
In Xymon through 4.3.28, a buffer overflow exists in the status-log viewer CGI because of expansion in appfeed.c.
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 | xymon | 4.3.29-1 | — |
| Debian 13 | xymon | 4.3.29-1 | — |
| Debian 12 | xymon | 4.3.29-1 | — |
| Debian 8 | xymon | 4.3.17-6+deb8u2 | DLA-1898-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | xymon | 4.3.29-1 | — |
| Ubuntu 18.04 LTS | xymon | No fix yet | — |
| Ubuntu 16.04 LTS | xymon | No fix yet | — |
Advisories 1
- DLA-1898-1 xymon - security update Debian Security (DSA / DLA) · Mar 9, 2026