[ GLSA 200505-05 ] gzip: Multiple vulnerabilities

[GLSA]

Gentoo Linux Security Advisory

Title: gzip: Multiple vulnerabilities (GLSA 200505-05)
Severity: normal
Exploitable: local
Date: May 09, 2005
Bug(s): #89946, #90626
ID: 200505-05

Synopsis


gzip contains multiple vulnerabilities potentially allowing an attacker to
execute arbitrary commands.


Background


gzip (GNU zip) is a popular compression program. The included
zgrep utility allows you to grep gzipped files in place.


Affected Packages

Package: app-arch/gzip
Vulnerable: < 1.3.5-r6
Unaffected: >= 1.3.5-r6
Architectures: All supported architectures


Description


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
(CAN-2005-0758).


Impact


These vulnerabilities could allow arbitrary command execution,
changing the permissions of arbitrary files, and installation of files
to an aribitrary location in the filesystem.


Workaround


There is no known workaround at this time.


Resolution


All gzip users should upgrade to the latest stable version: