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AUSCERT External Security Bulletin Redistribution
USN-4491-1: GnuTLS vulnerability
10 September 2020
AusCERT Security Bulletin Summary
Operating System: Ubuntu
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2020-24659
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running GnuTLS check for an updated version of the software for
their operating system.
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USN-4491-1: GnuTLS vulnerability
09 September 2020
GnuTLS could be made to crash or run programs if it received specially
crafted network traffic.
o Ubuntu 20.04 LTS
o gnutls28 - GNU TLS library
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
The problem can be corrected by updating your system to the following package
o libgnutls30 - 3.6.13-2ubuntu1.3
In general, a standard system update will make all the necessary changes.
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