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GNU Tar: Directory traversal vulnerability

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200709-09 / tar
Release Date September 15, 2007
Latest Revision September 15, 2007: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
app-arch/tar < 1.18-r2 >= 1.18-r2 All supported architectures

Related bugreports: #189682

Synopsis

A directory traversal vulnerability has been discovered in GNU Tar.

2.  Impact Information

Background

The GNU Tar program provides the ability to create tar archives, as well as various other kinds of manipulation.

Description

Dmitry V. Levin discovered a directory traversal vulnerability in the contains_dot_dot() function in file src/names.c.

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 GNU Tar.

3.  Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All GNU Tar users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-arch/tar-1.18-r2"

4.  References



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Page updated September 15, 2007

Summary: This is a Gentoo Linux Security Advisory

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