Description
ZNC before 1.7.1-rc1 is prone to a path traversal flaw via ../ in a web skin name to access files outside of the intended skins directories.
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 | znc | 1.7.1-1 | — |
| Debian 13 | znc | 1.7.1-1 | — |
| Debian 12 | znc | 1.7.1-1 | — |
| Debian 9 | znc | 1.6.5-1+deb9u1 | DSA-4252-1 |
| Debian 8 | znc | 1.4-2+deb8u1 | DLA-1427-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | znc | 1.6.6-1ubuntu0.1 | — |
| Ubuntu 16.04 LTS | znc | 1.6.3-1ubuntu0.1 | — |
| Ubuntu 14.04 LTS | znc | 1.2-3ubuntu0.1 | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | znc | 1.8.2-1.11 | openSUSE-SU-2024:11542-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | znc | 1.7.1-r0 | — |
| Alpine v3.23 | znc | 1.7.1-r0 | — |
| Alpine v3.22 | znc | 1.7.1-r0 | — |
| Alpine v3.21 | znc | 1.7.1-r0 | — |
| Alpine v3.20 | znc | 1.7.1-r0 | — |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | znc | 1.7.1-r0 | — |
| Alpine v3.18 | znc | 1.7.1-r0 | — |
| Alpine v3.17 | znc | 1.7.1-r0 | — |
| Alpine v3.16 | znc | 1.7.1-r0 | — |
| Alpine v3.15 | znc | 1.7.1-r0 | — |
| Alpine v3.14 | znc | 1.7.1-r0 | — |
| Alpine v3.13 | znc | 1.7.1-r0 | — |
| Alpine v3.12 | znc | 1.7.1-r0 | — |
| Alpine v3.11 | znc | 1.7.1-r0 | — |
| Alpine v3.10 | znc | 1.7.1-r0 | — |
| Alpine v3.9 | znc | 1.7.1-r0 | — |
| Alpine v3.8 | znc | 1.7.1-r0 | — |
| Alpine v3.7 | znc | 1.7.1-r0 | — |
| Alpine v3.6 | znc | 1.7.1-r0 | — |
| Alpine v3.5 | znc | 1.7.1-r0 | — |
Advisories 3
- DSA-4252-1 znc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1427-1 znc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:11542-1 znc-1.8.2-1.11 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://github.com/znc/znc/commit/a4a5aeeb17d32937d8c7d743dae9a4cc755ce773
- DSA-4252 vendor-advisory
- GLSA-201807-03 vendor-advisory