==========================================================Ubuntu Security Notice USN-158-1 August 01, 2005
gzip vulnerability CAN-2005-0758
A security issue affects the following Ubuntu releases:
The problem can be corrected by upgrading the affected package to
version 1.3.5-9ubuntu3.3 (for Ubuntu 4.10), or 1.3.5-9ubuntu3.4 (for
Ubuntu 5.04). In general, a standard system upgrade is sufficient to
effect the necessary changes.
zgrep did not handle shell metacharacters like '|' and '&' properly
when they occurred in input file names. This could be exploited to
execute arbitrary commands with user privileges if zgrep is run in an
untrusted directory with specially crafted file names.