[USN-5446-2] dpkg vulnerability

========================================================================== Ubuntu Security Notice USN-5446-2 May 30, 2022
dpkg vulnerability ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 16.04 ESM
A malicious source package could write files outside the unpack directory.
Software Description: – dpkg: Debian package management system
USN-5446-1 fixed a vulnerability in dpkg. This update provides the corresponding update for Ubuntu 16.04 ESM.
Original advisory details:
Max Justicz discovered that dpkg incorrectly handled unpacking certain source packages. If a user or an automated system were tricked into unpacking a specially crafted source package, a remote attacker could modify files outside the target unpack directory, leading to a denial of service or potentially gaining access to the system.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 16.04 ESM: dpkg 1.18.4ubuntu1.7+esm1 libdpkg-perl 1.18.4ubuntu1.7+esm1
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-5446-2 ubuntu.com/security/notices/USN-5446-1 CVE-2022-1664