https://usn.ubuntu.com/4491-1/

USN-4491-1: GnuTLS vulnerability

gnutls28 vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
Ubuntu 20.04 LTS
Summary
GnuTLS could be made to crash or run programs if it received specially crafted network traffic.
Software Description
gnutls28 - GNU TLS library
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.
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.04 LTS
libgnutls30 - 3.6.13-2ubuntu1.3
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
References
CVE-2020-24659
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CVE-2020-24659

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