GLSA-200606-02 : shadow: Privilege escalation

This script is Copyright (C) 2006-2014 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-200606-02
(shadow: Privilege escalation)

When the mailbox is created in useradd, the 'open()' function does
not receive the three arguments it expects while O_CREAT is present,
which leads to random permissions on the created file, before fchmod()
is executed.

Impact :

Depending on the random permissions given to the mailbox file
which is at this time owned by root, a local user may be able to open
this file for reading or writing, or even executing it, maybe as the
root user.

Workaround :

There is no known workaround at this time.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200606-02.xml

Solution :

All shadow users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=sys-apps/shadow-4.0.15-r2'

Risk factor :

Low / CVSS Base Score : 3.7
(CVSS2#AV:L/AC:H/Au:N/C:P/I:P/A:P)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 21664 (gentoo_GLSA-200606-02.nasl)

Bugtraq ID:

CVE ID: CVE-2006-1174