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Portage, Gentoolkit: Temporary file vulnerabilities


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200411-13 / portage gentoolkit
Release Date November 07, 2004
Latest Revision May 22, 2006: 02
Impact normal
Exploitable local
Package Vulnerable versions Unaffected versions Architecture(s)
sys-apps/portage <= 2.0.51-r2 >= 2.0.51-r3 All supported architectures
app-portage/gentoolkit <= 0.2.0_pre10 >= 0.2.0_pre10-r1, revision >= 0.2.0_pre8-r1 All supported architectures

Related bugreports: #68846, #69147


dispatch-conf (included in Portage) and qpkg (included in Gentoolkit) are vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files with the rights of the user running the script.

2.  Impact Information


Portage is Gentoo's package management tool. The dispatch-conf utility allows for easy rollback of configuration file changes and automatic updates of configurations files never modified by users. Gentoolkit is a collection of Gentoo specific administration scripts, one of which is the portage querying tool qpkg.


dispatch-conf and qpkg use predictable filenames for temporary files.


A local attacker could create symbolic links in the temporary files directory, pointing to a valid file somewhere on the filesystem. When an affected script is called, this would result in the file to be overwritten with the rights of the user running the dispatch-conf or qpkg, which could be the root user.

3.  Resolution Information


There is no known workaround at this time.


All Portage users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-apps/portage-2.0.51-r3"

All Gentoolkit users should upgrade to the latest version:

Code Listing 3.2: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-portage/gentoolkit-0.2.0_pre8-r1"

4.  References


Page updated November 07, 2004

Summary: This is a Gentoo Linux Security Advisory

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