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Kategori: Gentoo Local Security Checks Riskfaktor: High Tillagt: 11 Oct 2008
The remote host is affected by the vulnerability described in GLSA-200810-02
(Portage: Untrusted search path local root vulnerability)


The Gentoo Security Team discovered that several ebuilds, such as sys-apps/portage, net-mail/fetchmail or app-editors/leo execute Python
code using "python -c", which includes the current working directory in Python's module search path. For several ebuild functions, Portage did not change the working directory from emerge's working directory.

Impact

A local attacker could place a specially crafted Python module in a directory (such as /tmp) and entice the root user to run commands such
as "emerge sys-apps/portage" from that directory, resulting in the execution of arbitrary Python code with root privileges.

Workaround

Do not run "emerge" from untrusted working directories.

References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4394


Solution:
All Portage users should upgrade to the latest version:
# cd /root
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-apps/portage-2.1.4.5"
NOTE: To upgrade to Portage 2.1.4.5 using 2.1.4.4 or prior, you must run emerge from a trusted working directory, such as "/root".


Risk factor: High

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