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Tar: Directory traversal vulnerability


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200612-10 / tar
Release Date December 11, 2006
Latest Revision December 11, 2006: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
app-arch/tar < 1.16-r2 >= 1.16-r2 All supported architectures

Related bugreports: #155901


Tar is vulnerable to directory traversal possibly allowing for the overwriting of arbitrary files.

2.  Impact Information


The Tar program provides the ability to create and manipulate tar archives.


Tar does not properly extract archive elements using the GNUTYPE_NAMES record name, allowing files to be created at arbitrary locations using symlinks. Once a symlink is extracted, files after the symlink in the archive will be extracted to the destination of the symlink.


An attacker could entice a user to extract a specially crafted tar archive, possibly allowing for the overwriting of arbitrary files on the system extracting the archive.

3.  Resolution Information


There is no known workaround at this time.


All Tar users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-arch/tar-1.16-r2"

4.  References


Page updated December 11, 2006

Summary: This is a Gentoo Linux Security Advisory

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