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Ubuntu Security Notice USN-6436-1
October 18, 2023

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

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

Summary:

Several security issues were fixed in FRR.

Software Description:
- frr: FRRouting suite of internet protocols

Details:

It was discovered that the FRR did not properly check the attribute length
in NRLI. A remote attacker could possibly use this issue to cause a denial
of service. (CVE-2023-41358)

It was discovered that the FRR did not properly manage memory when reading
initial bytes of ORF header. A remote attacker could possibly use this
issue to cause a denial of service. (CVE-2023-41360)

It was discovered that FRR did not properly validate the attributes in the
BGP FlowSpec functionality. A remote attacker could possibly use this issue
to cause a denial of service. (CVE-2023-41909)

Update instructions:

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

Ubuntu 23.04:
  frr                             8.4.2-1ubuntu1.4

Ubuntu 22.04 LTS:
  frr                             8.1-1ubuntu1.6

Ubuntu 20.04 LTS (Available with Ubuntu Pro):
  frr                             7.2.1-1ubuntu0.2+esm1

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

References:
  https://ubuntu.com/security/notices/USN-6436-1
  CVE-2023-41358, CVE-2023-41360, CVE-2023-41909

Package Information:
  https://launchpad.net/ubuntu/+source/frr/8.4.2-1ubuntu1.4
  https://launchpad.net/ubuntu/+source/frr/8.1-1ubuntu1.6