GLSA-200710-25 : MLDonkey: Privilege escalation

This script is Copyright (C) 2007-2014 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-200710-25
(MLDonkey: Privilege escalation)

The Gentoo MLDonkey ebuild adds a user to the system named 'p2p' so
that the MLDonkey service can run under a user with low privileges.
With older Portage versions this user is created with a valid login
shell and no password.

Impact :

A remote attacker could log into a vulnerable system as the p2p user.
This would require an installed login service that permitted empty
passwords, such as SSH configured with the 'PermitEmptyPasswords yes'
option, a local login console, or a telnet server.

Workaround :

See Resolution.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200710-25.xml

Solution :

Change the p2p user's shell to disallow login. For example, as root run
the following command:
# usermod -s /bin/false p2p
NOTE: updating to the current MLDonkey ebuild will not remove this
vulnerability, it must be fixed manually. The updated ebuild is to
prevent this problem from occurring in the future.

Risk factor :

Medium / CVSS Base Score : 6.8
(CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 27557 (gentoo_GLSA-200710-25.nasl)

Bugtraq ID:

CVE ID: CVE-2007-5714