Star: Directory traversal vulnerability

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200710-23 / star
Release Date	October 22, 2007
Latest Revision	October 22, 2007: 01
Impact	low
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
app-arch/star	< 1.5_alpha84	>= 1.5_alpha84	All supported architectures

Related bugreports: #189690

Synopsis

A directory traversal vulnerability has been discovered in Star.

2. Impact Information

Background

The Star program provides the ability to create and extract tar archives.

Description

Robert Buchholz of the Gentoo Security team discovered a directory traversal vulnerability in the has_dotdot() function which does not identify //.. (slash slash dot dot) sequences in file names inside tar files.

Impact

By enticing a user to extract a specially crafted tar archive, a remote attacker could extract files to arbitrary locations outside of the specified directory with the permissions of the user running Star.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Star users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-arch/star-1.5_alpha84"

4. References

CVE-2007-4134

Page updated October 22, 2007

Summary: This is a Gentoo Linux Security Advisory

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