1. Ubuntu Security Notices
  2. USN-4491-1

USN-4491-1: GnuTLS vulnerability

Publication date

9 September 2020

Overview

GnuTLS could be made to crash or run programs if it received specially crafted network traffic.

Releases

Packages

Details

It was discovered that GnuTLS incorrectly handled certain alerts when being
used with TLS 1.3 servers. A remote attacker could use this issue to cause
GnuTLS to crash, resulting in a denial of service, or possibly execute
arbitrary code.

It was discovered that GnuTLS incorrectly handled certain alerts when being
used with TLS 1.3 servers. A remote attacker could use this issue to cause
GnuTLS to crash, resulting in a denial of service, or possibly execute
arbitrary code.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
20.04 focal libgnutls30 –  3.6.13-2ubuntu1.3

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References

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