==========================================================Ubuntu Security Notice USN-161-1 August 04, 2005
bzip2 vulnerability CAN-2005-0758
A security issue affects the following Ubuntu releases:
The problem can be corrected by upgrading the affected package to
version 1.0.2-1ubuntu0.2 (for Ubuntu 4.10), or 1.0.2-2ubuntu0.2 (for
Ubuntu 5.04). In general, a standard system upgrade is sufficient to
effect the necessary changes.
USN-158-1 fixed a command injection vulnerability in the "zgrep"
utility. It was determined that the "bzgrep" counterpart in the bzip2
package is vulnerable to the same flaw.
bzgrep 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 bzgrep was run in
an untrusted directory with specially crafted file names.