gzip: Multiple vulnerabilities
Gentoo Linux Security Advisory
||GLSA 200505-05 / gzip
||May 09, 2005
||May 09, 2005: 01
All supported architectures
gzip contains multiple vulnerabilities potentially allowing an attacker to
execute arbitrary commands.
gzip (GNU zip) is a popular compression program. The included
zgrep utility allows you to grep gzipped files in place.
The gzip and gunzip programs are vulnerable to a race condition
when setting file permissions (CAN-2005-0988), as well as improper
handling of filename restoration (CAN-2005-1228). The zgrep utility
improperly sanitizes arguments, which may come from an untrusted source
These vulnerabilities could allow arbitrary command execution,
changing the permissions of arbitrary files, and installation of files
to an aribitrary location in the filesystem.
There is no known workaround at this time.
All gzip users should upgrade to the latest stable version:
Code Listing 3.1: Resolution
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-arch/gzip-1.3.5-r6"