[USN-6489-1] Tang vulnerability

Jorge Sancho Larraz jorge.sancho.larraz at canonical.com
Mon Nov 20 17:07:57 UTC 2023

Ubuntu Security Notice USN-6489-1
November 20, 2023

tang vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.04
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)


Tang could allow unintended access to secret keys.

Software Description:
- tang: network-based cryptographic binding server


Brian McDermott discovered that Tang incorrectly handled permissions when
creating/rotating keys. A local attacker could possibly use this issue to
read the keys.

Update instructions:

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

Ubuntu 23.04:
   tang-common                     11-2ubuntu0.1

Ubuntu 22.04 LTS:
   tang-common                     11-1ubuntu0.1

Ubuntu 20.04 LTS:
   tang                            7-1ubuntu0.2

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   tang                            6-1ubuntu0.1~esm1

In general, a standard system update will make all the necessary changes.


Package Information:

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