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Ubuntu Security Notice USN-5446-2
Ubuntu Security Notice 5446-2 - USN-5446-1 fixed a vulnerability in dpkg. This update provides the corresponding update for Ubuntu 16.04 ESM. 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.
=========================================================================Ubuntu Security Notice USN-5446-2May 30, 2022dpkg vulnerability=========================================================================A security issue affects these releases of Ubuntu and its derivatives:- Ubuntu 16.04 ESMSummary:A malicious source package could write files outside the unpack directory.Software Description:- dpkg: Debian package management systemDetails:USN-5446-1 fixed a vulnerability in dpkg. This update providesthe 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 followingpackage versions:Ubuntu 16.04 ESM: dpkg 1.18.4ubuntu1.7+esm1 libdpkg-perl 1.18.4ubuntu1.7+esm1In general, a standard system update will make all the necessary changes.References: https://ubuntu.com/security/notices/USN-5446-2 https://ubuntu.com/security/notices/USN-5446-1 CVE-2022-1664Related news
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Ubuntu Security Notice 5446-1 - 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.
Dpkg::Source::Archive in dpkg, the Debian package management system, before version 1.21.8, 1.20.10, 1.19.8, 1.18.26 is prone to a directory traversal vulnerability. When extracting untrusted source packages in v2 and v3 source package formats that include a debian.tar, the in-place extraction can lead to directory traversal situations on specially crafted orig.tar and debian.tar tarballs.