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USN-4256-1: Cyrus SASL vulnerability

28 January 2020

Cyrus SASL could be made to crash or execute arbitrary code if it received a specially crafted LDAP packet.



  • cyrus-sasl2 - Cyrus Simple Authentication and Security Layer


It was discovered that Cyrus SASL incorrectly handled certain LDAP packets.
An attacker could possibly use this issue to execute arbitrary code or cause
a denial of service.

Update instructions

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

Ubuntu 19.10
Ubuntu 18.04
Ubuntu 16.04
Ubuntu 14.04
Ubuntu 12.04

After a standard system update you need to restart services using
SASL to effect the necessary changes.