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USN-5301-1: Cyrus SASL vulnerability

22 February 2022

Cyrus SASL could run programs if it received specially crafted network traffic.



  • cyrus-sasl2 - Cyrus Simple Authentication and Security Layer


It was discovered that the Cyrus SASL SQL plugin incorrectly handled SQL
input. A remote attacker could use this issue to execute arbitrary SQL

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 21.10
Ubuntu 20.04
Ubuntu 18.04

After a standard system update you need to reboot your computer to make
all the necessary changes.


Related notices

  • USN-5301-2: libsasl2-modules-otp, cyrus-sasl2, libsasl2-dev, libsasl2-modules-ldap, libsasl2-modules, cyrus-sasl2-doc, libsasl2-2, libsasl2-modules-sql, libsasl2-modules-db, libsasl2-modules-gssapi-mit, libsasl2-modules-gssapi-heimdal, sasl2-bin