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Ubuntu 20.04: USN-4491-1 Moderate: GnuTLS Denial of Service Issue

ubuntu
Calendar Grey September 9, 2020
Dist Ubuntu Esm H88
A potential GnuTLS flaw in Ubuntu could lead to system crashes or allow malicious code execution via specially crafted network packets. It's advised to perform an update.
GnuTLS could be made to crash or run programs if it received specially crafted network traffic.

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.

Topics%20covered

Topics Covered

security advisory denial of service remote code execution Ubuntu gnutls network attack crash

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

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

References

https://ubuntu.com/security/notices/USN-4491-1

CVE-2020-24659

Severity
important
Lowest
Low
Medium
High
Critical

September 09, 2020

Topics%20covered

Topics Covered

security advisory denial of service remote code execution Ubuntu gnutls network attack crash

Package Information

https://launchpad.net/ubuntu/+source/gnutls28/3.6.13-2ubuntu1.3

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