[USN-5378-1] Gzip vulnerability

[Marc Deslauriers]

==========================================================================
Ubuntu Security Notice USN-5378-1
April 13, 2022

gzip vulnerability
==========================================================================

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

- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Gzip could be made to overwrite arbitrary files.

Software Description:
- gzip: GNU compression utilities

Details:

Cleemy Desu Wayo discovered that Gzip incorrectly handled certain
filenames. If a user or automated system were tricked into performing zgrep
operations with specially crafted filenames, a remote attacker could
overwrite arbitrary files.

Update instructions:

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

Ubuntu 21.10:
  gzip                            1.10-4ubuntu1.1

Ubuntu 20.04 LTS:
  gzip                            1.10-0ubuntu4.1

Ubuntu 18.04 LTS:
  gzip                            1.6-5ubuntu1.2

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

References:
  https://ubuntu.com/security/notices/USN-5378-1
  CVE-2022-1271

Package Information:
  https://launchpad.net/ubuntu/+source/gzip/1.10-4ubuntu1.1
  https://launchpad.net/ubuntu/+source/gzip/1.10-0ubuntu4.1
  https://launchpad.net/ubuntu/+source/gzip/1.6-5ubuntu1.2
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