[ 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: