Description
Modules.cpp in ZNC before 1.7.4-rc1 allows remote authenticated non-admin users to escalate privileges and execute arbitrary code by loading a module with a crafted name.
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 | 1.7.2-3 | — |
| Debian 13 | znc | 1.7.2-3 | — |
| Debian 12 | znc | 1.7.2-3 | — |
| Debian 9 | znc | 1.6.5-1+deb9u2 | DSA-4463-1 |
| Debian 8 | znc | 1.4-2+deb8u2 | DLA-1830-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | znc | 1.6.6-1ubuntu0.2 | USN-4044-1 |
| Ubuntu 16.04 LTS | znc | 1.6.3-1ubuntu0.2 | USN-4044-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | znc | 1.2-3ubuntu0.1+esm1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP1 | znc | 1.7.4-bp151.4.3.1 | openSUSE-SU-2019:1859-1 |
| SUSE Package Hub 15 | znc | 1.7.4-bp150.2.6.1 | openSUSE-SU-2019:1775-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | znc | 1.8.2-1.11 | openSUSE-SU-2024:11542-1 |
| openSUSE Leap 15.1 | znc | 1.7.4-bp150.2.6.1 | openSUSE-SU-2019:1775-1 |
| openSUSE Leap 15.0 | znc | 1.7.4-bp150.2.6.1 | openSUSE-SU-2019:1775-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | znc | 1.7.4-r0 | — |
| Alpine v3.23 | znc | 1.7.4-r0 | — |
| Alpine v3.22 | znc | 1.7.4-r0 | — |
| Alpine v3.21 | znc | 1.7.4-r0 | — |
| Alpine v3.20 | znc | 1.7.4-r0 | — |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | znc | 1.7.4-r0 | — |
| Alpine v3.18 | znc | 1.7.4-r0 | — |
| Alpine v3.17 | znc | 1.7.4-r0 | — |
| Alpine v3.16 | znc | 1.7.4-r0 | — |
| Alpine v3.15 | znc | 1.7.4-r0 | — |
| Alpine v3.14 | znc | 1.7.4-r0 | — |
| Alpine v3.13 | znc | 1.7.4-r0 | — |
| Alpine v3.12 | znc | 1.7.4-r0 | — |
| Alpine v3.11 | znc | 1.7.4-r0 | — |
| Alpine v3.10 | znc | 1.7.4-r0 | — |
| Alpine v3.9 | znc | 1.7.1-r4 | — |
| Alpine v3.8 | znc | 1.7.1-r1 | — |
| Alpine v3.7 | znc | 1.7.1-r1 | — |
Advisories 6
- USN-4044-1 znc vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4463-1 znc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1830-1 znc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2019:1859-1 Security update for znc SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1775-1 Security update for znc SUSE / openSUSE Security Updates · Feb 4, 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/8de9e376ce531fe7f3c8b0aa4876d15b479b7311
- https://github.com/znc/znc/compare/be1b6bc...d1997d6
- 20190617 [SECURITY] [DSA 4463-1] znc security update mailing-list
- [debian-lts-announce] 20190620 [SECURITY] [DLA 1830-1] znc security update mailing-list
- USN-4044-1 vendor-advisory
- openSUSE-SU-2019:1775 vendor-advisory
- openSUSE-SU-2019:1859 vendor-advisory
- GLSA-201908-15 vendor-advisory
- FEDORA-2019-154930f99b vendor-advisory
- FEDORA-2019-233d9b9a5e vendor-advisory
- FEDORA-2019-0e70ef9cbb vendor-advisory