RHEL 6 / 7 : pam (RHSA-2015:1640)

This script is Copyright (C) 2015-2017 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing one or more security updates.

Description :

An updated pam package that fixes one security issue is now available
for Red Hat Enterprise Linux 6 and 7.

Red Hat Product Security has rated this update as having Moderate
security impact. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available from the
CVE link in the References section.

Pluggable Authentication Modules (PAM) provide a system whereby
administrators can set up authentication policies without having to
recompile programs to handle authentication.

It was discovered that the _unix_run_helper_binary() function of PAM's
unix_pam module could write to a blocking pipe, possibly causing the
function to become unresponsive. An attacker able to supply large
passwords to the unix_pam module could use this flaw to enumerate
valid user accounts, or cause a denial of service on the system.
(CVE-2015-3238)

Red Hat would like to thank Sebastien Macke of Trustwave SpiderLabs
for reporting this issue.

All pam users are advised to upgrade to this updated package, which
contains a backported patch to correct this issue.

See also :

https://www.redhat.com/security/data/cve/CVE-2015-3238.html
http://rhn.redhat.com/errata/RHSA-2015-1640.html

Solution :

Update the affected pam, pam-debuginfo and / or pam-devel packages.

Risk factor :

Medium / CVSS Base Score : 5.8
(CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:P)
CVSS Temporal Score : 4.8
(CVSS2#E:F/RL:OF/RC:ND)
Public Exploit Available : true

Family: Red Hat Local Security Checks

Nessus Plugin ID: 85530 ()

Bugtraq ID:

CVE ID: CVE-2015-3238

Ready to Amp Up Your Nessus Experience?

Get Nessus Professional to scan unlimited IPs, run compliance checks & more

Buy Nessus Professional Now