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AUSCERT External Security Bulletin Redistribution
Ubuntu bulletin: USN-3950-1: ZNC vulnerability
23 April 2019
AusCERT Security Bulletin Summary
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
CVE Names: CVE-2019-9917
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USN-3950-1: ZNC vulnerability
18 April 2019
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 18.10
ZNC could be made to crash or run programs if it received specially crafted
o znc - advanced modular IRC bouncer
It was discovered that ZNC incorrectly handled certain invalid encodings. An
authenticated remote user could use this issue to cause ZNC to crash, resulting
in a denial of service, or possibly execute arbitrary code.
The problem can be corrected by updating your system to the following package
znc - 1.7.1-2ubuntu0.1
To update your system, please follow these instructions: https://
In general, a standard system update will make all the necessary changes.
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