Scientific Linux: SSSD Low Risk Security Advisory With Memory Leak

Date: Tue, 10 Nov 2015 15:03:57 +0000
Reply-To: scientific-linux-users@
Sender: Security Errata for Scientific Linux
 
From: Kevin Hill 
Subject: Security ERRATA Low: sssd on SL6.x i386/x86_64
MIME-Version: 1.0
Message-ID: <20151110150357.11882.19851@slpackages.fnal.gov>

Synopsis: Low: sssd security and bug fix update
Advisory ID: SLSA-2015:2019-1
Issue Date: 2015-11-10
CVE Numbers: CVE-2015-5292
--

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. (CVE-2015-5292)

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.

* 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.

* 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.

* 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.

After installing the update, the sssd service will be restarted
automatically. Additionally, all running applications using the PAC
responder plug-in must be restarted for the changes to take effect.
--

SL6
 x86_64
 libipa_hbac-1.12.4-47.el6_7.4.i686.rpm
 libipa_hbac-1.12.4-47.el6_7.4.x86_64.rpm
 libipa_hbac-python-1.12.4-47.el6_7.4.x86_64.rpm
 libsss_idmap-1.12.4-47.el6_7.4.i686.rpm
 libsss_idmap-1.12.4-47.el6_7.4.x86_64.rpm
 sssd-1.12.4-47.el6_7.4.x86_64.rpm
 sssd-ad-1.12.4-47.el6_7.4.x86_64.rpm
 sssd-client-1.12.4-47.el6_7.4.i686.rpm
 sssd-client-1.12.4-47.el6_7.4.x86_64.rpm
 sssd-common-1.12.4-47.el6_7.4.x86_64.rpm
 sssd-common-pac-1.12.4-47.el6_7.4.x86_64.rpm
 sssd-dbus-1.12.4-47.el6_7.4.x86_64.rpm
 sssd-debuginfo-1.12.4-47.el6_7.4.i686.rpm
 sssd-debuginfo-1.12.4-47.el6_7.4.x86_64.rpm
 sssd-ipa-1.12.4-47.el6_7.4.x86_64.rpm
 sssd-krb5-1.12.4-47.el6_7.4.x86_64.rpm
 sssd-krb5-common-1.12.4-47.el6_7.4.x86_64.rpm
 sssd-ldap-1.12.4-47.el6_7.4.x86_64.rpm
 sssd-proxy-1.12.4-47.el6_7.4.x86_64.rpm
 libipa_hbac-devel-1.12.4-47.el6_7.4.i686.rpm
 libipa_hbac-devel-1.12.4-47.el6_7.4.x86_64.rpm
 libsss_idmap-devel-1.12.4-47.el6_7.4.i686.rpm
 libsss_idmap-devel-1.12.4-47.el6_7.4.x86_64.rpm
 libsss_nss_idmap-1.12.4-47.el6_7.4.i686.rpm
 libsss_nss_idmap-1.12.4-47.el6_7.4.x86_64.rpm
 libsss_nss_idmap-devel-1.12.4-47.el6_7.4.i686.rpm
 libsss_nss_idmap-devel-1.12.4-47.el6_7.4.x86_64.rpm
 libsss_nss_idmap-python-1.12.4-47.el6_7.4.x86_64.rpm
 libsss_simpleifp-1.12.4-47.el6_7.4.i686.rpm
 libsss_simpleifp-1.12.4-47.el6_7.4.x86_64.rpm
 libsss_simpleifp-devel-1.12.4-47.el6_7.4.i686.rpm
 libsss_simpleifp-devel-1.12.4-47.el6_7.4.x86_64.rpm
 sssd-tools-1.12.4-47.el6_7.4.x86_64.rpm
 i386
 libipa_hbac-1.12.4-47.el6_7.4.i686.rpm
 libipa_hbac-python-1.12.4-47.el6_7.4.i686.rpm
 libsss_idmap-1.12.4-47.el6_7.4.i686.rpm
 sssd-1.12.4-47.el6_7.4.i686.rpm
 sssd-ad-1.12.4-47.el6_7.4.i686.rpm
 sssd-client-1.12.4-47.el6_7.4.i686.rpm
 sssd-common-1.12.4-47.el6_7.4.i686.rpm
 sssd-common-pac-1.12.4-47.el6_7.4.i686.rpm
 sssd-dbus-1.12.4-47.el6_7.4.i686.rpm
 sssd-debuginfo-1.12.4-47.el6_7.4.i686.rpm
 sssd-ipa-1.12.4-47.el6_7.4.i686.rpm
 sssd-krb5-1.12.4-47.el6_7.4.i686.rpm
 sssd-krb5-common-1.12.4-47.el6_7.4.i686.rpm
 sssd-ldap-1.12.4-47.el6_7.4.i686.rpm
 sssd-proxy-1.12.4-47.el6_7.4.i686.rpm
 libipa_hbac-devel-1.12.4-47.el6_7.4.i686.rpm
 libsss_idmap-devel-1.12.4-47.el6_7.4.i686.rpm
 libsss_nss_idmap-1.12.4-47.el6_7.4.i686.rpm
 libsss_nss_idmap-devel-1.12.4-47.el6_7.4.i686.rpm
 libsss_nss_idmap-python-1.12.4-47.el6_7.4.i686.rpm
 libsss_simpleifp-1.12.4-47.el6_7.4.i686.rpm
 libsss_simpleifp-devel-1.12.4-47.el6_7.4.i686.rpm
 sssd-tools-1.12.4-47.el6_7.4.i686.rpm
 noarch
 python-sssdconfig-1.12.4-47.el6_7.4.noarch.rpm

- Scientific Linux Development Team