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USN-5446-1: dpkg vulnerability

26 May 2022

A malicious source package could write files outside the unpack directory.

Releases

Packages

  • dpkg - Debian package management system

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 22.04
Ubuntu 21.10
Ubuntu 20.04
Ubuntu 18.04

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

References

Related notices

  • USN-5446-2: libdpkg-dev, dpkg, dpkg-dev, dselect, libdpkg-perl