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Test ID:
Category:Red Hat Local Security Checks
Title:RedHat Update for sssd RHSA-2015:2019-01
Summary:The remote host is missing an update for the 'sssd'; package(s) announced via the referenced advisory.
The remote host is missing an update for the 'sssd'
package(s) announced via the referenced advisory.

Vulnerability Insight:
The System Security Services Daemon (SSSD) service provides a set of
daemons to manage access to remote directories and authentication
mechanisms. It also provides the Name Service Switch (NSS) and the
Pluggable Authentication Modules (PAM) interfaces toward the system, and a
pluggable back-end system to connect to multiple different account sources.

It was found that SSSD's Privilege Attribute Certificate (PAC) responder
plug-in would leak a small amount of memory on each authentication request.
A remote attacker could potentially use this flaw to exhaust all available
memory on the system by making repeated requests to a Kerberized daemon
application configured to authenticate using the PAC responder plug-in.

This update also fixes the following bugs:

* Previously, SSSD did not correctly handle sudo rules that applied to
groups with names containing special characters, such as the '(' opening
parenthesis sign. Consequently, SSSD skipped such sudo rules. The internal
sysdb search has been modified to escape special characters when searching
for objects to which sudo rules apply. As a result, SSSD applies the
described sudo rules as expected. (BZ#1258398)

* Prior to this update, SSSD did not correctly handle group names
containing special Lightweight Directory Access Protocol (LDAP) characters,
such as the '(' or ')' parenthesis signs. When a group name contained one
or more such characters, the internal cache cleanup operation failed with
an I/O error. With this update, LDAP special characters in the
Distinguished Name (DN) of a cache entry are escaped before the cleanup
operation starts. As a result, the cleanup operation completes successfully
in the described situation. (BZ#1264098)

* Applications performing Kerberos authentication previously increased the
memory footprint of the Kerberos plug-in that parses the Privilege
Attribute Certificate (PAC) information. The plug-in has been updated to
free the memory it allocates, thus fixing this bug. (BZ#1268783)

* Previously, when malformed POSIX attributes were defined in an Active
Directory (AD) LDAP server, SSSD unexpectedly switched to offline mode.
This update relaxes certain checks for AD POSIX attribute validity. As a
result, SSSD now works as expected even when malformed POSIX attributes are
present in AD and no longer enters offline mode in the described situation.

All sssd users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. Af ...

Description truncated, please see the referenced URL(s) for more information.

Affected Software/OS:
sssd on Red Hat Enterprise Linux Desktop (v. 6),
Red Hat Enterprise Linux Server (v. 6),
Red Hat Enterprise Linux Workstation (v. 6)

Please Install the Updated Packages.

CVSS Score:

CVSS Vector:

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2015-5292
BugTraq ID: 77529
RedHat Security Advisories: RHSA-2015:2019
RedHat Security Advisories: RHSA-2015:2355
CopyrightCopyright (C) 2015 Greenbone Networks GmbH

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