==========================================================================
Ubuntu Security Notice USN-6712-1
March 25, 2024
libnet-cidr-lite-perl vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
Summary:
Net::CIDR::Lite could allow unintended access to network services.
Software Description:
- libnet-cidr-lite-perl: module for merging IPv4 or IPv6 CIDR address ranges
Details:
It was discovered that Net::CIDR::Lite incorrectly handled extra zero
characters at the beginning of IP address strings. A remote attacker could
possibly use this issue to bypass access controls.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04 LTS:
   libnet-cidr-lite-perl           0.21-2ubuntu0.1
In general, a standard system update will make all the necessary changes.
References:
   https://ubuntu.com/security/notices/USN-6712-1
   CVE-2021-47154
Package Information:
   https://launchpad.net/ubuntu/+source/libnet-cidr-lite-perl/0.21-2ubuntu0.1