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Netatalk: Insecure tempfile handling in


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200410-25 / Netatalk
Release Date October 25, 2004
Latest Revision October 25, 2004: 01
Impact normal
Exploitable local
Package Vulnerable versions Unaffected versions Architecture(s)
net-fs/netatalk < 1.6.4-r1 >= 1.6.4-r1 All supported architectures

Related bugreports: #66370


The script, included in the Netatalk package, is vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files with the rights of the user running the utility.

2.  Impact Information


Netatalk is a kernel level implementation of the AppleTalk Protocol Suite, which allows Unix hosts to act as file, print, and time servers for Apple computers. It includes several script utilities, including


The script creates temporary files in world-writeable directories with predictable names.


A local attacker could create symbolic links in the temporary files directory, pointing to a valid file somewhere on the filesystem. When is executed, this would result in the file being overwritten with the rights of the user running the utility, which could be the root user.

3.  Resolution Information


There is no known workaround at this time.


All Netatalk users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge sync
# emerge -pv ">=net-fs/netatalk-1.6.4-r1"
# emerge ">=net-fs/netatalk-1.6.4-r1"

4.  References


Page updated October 25, 2004

Summary: This is a Gentoo Linux Security Advisory

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