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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.

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Releases

Packages

  • cyrus-sasl2 - Cyrus Simple Authentication and Security Layer

Details

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.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

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.

References

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Further reading