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GNU Tar: Directory traversal vulnerability


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


A directory traversal vulnerability has been discovered in GNU Tar.

2.  Impact Information


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


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


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


There is no known workaround at this time.


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


Page updated September 15, 2007

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