Description
Multiple CRLF injection vulnerabilities in webadmin in ZNC before 0.066 allow remote authenticated users to modify the znc.conf configuration file and gain privileges via CRLF sequences in the quit message and other vectors.
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 | 0.066-1 | — |
| Debian 13 | znc | 0.066-1 | — |
| Debian 12 | znc | 0.066-1 | — |
| Debian 5.0 | znc | 0.058-2+lenny1 | DSA-1735-1 |
| Debian 4.0 | znc | 0.045-3+etch2 | DSA-1735-1 |
Advisories 1
- DSA-1735-1 znc - privilege escalation Debian Security (DSA / DLA) · Mar 9, 2026
References
- 34230 third-party-advisory
- DSA-1735 vendor-advisory
- [oss-security] 20090301 CVE id request: znc mailing-list
- http://znc.svn.sourceforge.net/viewvc/znc?view=rev&sortby=rev&sortdir=down&revision=1395
- 52295 vdb-entry
- http://znc.svn.sourceforge.net/viewvc/znc/trunk/modules/webadmin.cpp?view=log&sortby=rev&sortdir=down&pathrev=1395
- http://znc.svn.sourceforge.net/viewvc/znc?view=rev&sortby=rev&sortdir=down&revision=1396