Synopsis

Low: sssd security, bug fix, and enhancement update

Type/Severity

Security Advisory: Low

Topic

Updated sssd packages that fix one security issue, several bugs, and add
various enhancements are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having low
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.

Description

The System Security Services Daemon (SSSD) provides a set of daemons to
manage access to remote directories and authentication mechanisms. It
provides an NSS and PAM interface toward the system and a pluggable
back-end system to connect to multiple different account sources. It is
also the basis to provide client auditing and policy services for projects
such as FreeIPA.

A flaw was found in the SSSD PAM responder that could allow a local
attacker to force SSSD to enter an infinite loop via a carefully-crafted
packet. With SSSD unresponsive, legitimate users could be denied the
ability to log in to the system. (CVE-2010-4341)

Red Hat would like to thank Sebastian Krahmer for reporting this issue.

These updated sssd packages include a number of bug fixes and enhancements.
Space precludes documenting all of these changes in this advisory. Refer to
the Red Hat Enterprise Linux 5.7 Technical Notes for information about
these changes:

https://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/5.7_Technical_Notes/sssd.html#RHSA-2011-0975

All sssd users are advised to upgrade to these updated sssd packages, which
upgrade SSSD to upstream version 1.5.1 to correct this issue, and fix the
bugs and add the enhancements noted in the Technical Notes.

Solution

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 640601 - sssd is not escaping correctly LDAP searches
• BZ - 661163 - CVE-2010-4341 sssd: DoS in sssd PAM responder can prevent logins
• BZ - 675007 - sssd corrupts group cache
• BZ - 676027 - sssd segfault when first entry of ldap_uri is unreachable
• BZ - 678032 - Remove HBAC time rules from SSSD
• BZ - 678092 - SSSD in 5.6 can not locate HBAC rules from FreeIPAv2
• BZ - 678412 - name service caches names, so id command shows recently deleted users
• BZ - 678606 - User information not updated on login for secondary domains
• BZ - 678615 - SSSD needs to look at IPA's compat tree for netgroups
• BZ - 678778 - IPA provider does not update removed group memberships on initgroups
• BZ - 678780 - sssd crashes at the next tgt renewals it tries.
• BZ - 679087 - SSSD IPA provider should honor the krb5_realm option
• BZ - 679097 - Does not read renewable ccache at startup.
• BZ - 682803 - sssd-be segmentation fault - ipa-client on ipa-server
• BZ - 682808 - sssd_nss core dumps with certain lookups
• BZ - 682853 - IPA provider should use realm instead of ipa_domain for base DN
• BZ - 683260 - sudo/ldap lookup via sssd gets stuck for 5min waiting on netgroup
• BZ - 688677 - Build SSSD in RHEL 5.7 against openldap24-libs
• BZ - 688694 - authconfig fails when access_provider is set as krb5 in sssd.conf.
• BZ - 688697 - sssd 1.5.1-9 breaks AD authentication
• BZ - 689887 - group memberships are not populated correctly during IPA provider initgroups
• BZ - 690093 - multiple problems with sssd + ldap (Active-Directory) and groups members.
• BZ - 690096 - SSSD should skip over groups with multiple names
• BZ - 690287 - Traceback messages seen while interrupting sss_obfuscate using ctrl+d.
• BZ - 690814 - [abrt] sssd-1.2.1-28.el6_0.4: _talloc_free: Process /usr/libexec/sssd/sssd_be was killed by signal 11 (SIGSEGV)
• BZ - 690867 - Groups with a zero-length memberuid attribute can cause SSSD to stop caching and responding to requests
• BZ - 691900 - SSSD needs to fall back to 'cn' for GECOS information (was: SSSD configuration problem when configured with MSAD)
• BZ - 692960 - Process /usr/libexec/sssd/sssd_be was killed by signal 11 (SIGSEGV)
• BZ - 694149 - SSSD consumes GBs of RAM, possible memory leak
• BZ - 694853 - SSSD crashes during getent when anonymous bind is disabled.
• BZ - 695476 - Unable to resolve SRV record when called with _srv_,<fixed ldap uri> in ldap_uri
• BZ - 696979 - [REGRESSION] Filters not honoured against fully-qualified users.
• BZ - 701702 - sssd client libraries use select() but should use poll() instead
• BZ - 707340 - latest sssd fails if ldap_default_authtok_type is not mentioned
• BZ - 707574 - SSSD's async resolver only tries the first nameserver in /etc/resolv.conf

CVEs

• CVE-2010-4341

References

• https://access.redhat.com/security/updates/classification/#low
• https://fedorahosted.org/sssd/wiki/Releases/Notes-1.5.1
• https://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/5.7_Technical_Notes/sssd.html#RHSA-2011-0975

Red Hat Enterprise Linux Server 5

SRPM
sssd-1.5.1-37.el5.src.rpm	SHA-256: ebdf36a04aafabca61cc8f5e2466e3034f0966ca86cc11695b8267929f2bfda6
x86_64
sssd-1.5.1-37.el5.x86_64.rpm	SHA-256: 04715084960ea4979bad2c7ac4581456e868567d45c0dada3fd3cdd829dd6a77
sssd-client-1.5.1-37.el5.i386.rpm	SHA-256: a9a416189b1e8d5df4116a184cb411c6b69792101524916b22a3cfc0400c4039
sssd-client-1.5.1-37.el5.x86_64.rpm	SHA-256: 34d8fcecb507676abaaad72f8644fd85abc9444c5f8f052cdda0fa50fd3a9e75
sssd-tools-1.5.1-37.el5.x86_64.rpm	SHA-256: a72bf5880466d93c1647a187c7e311c90b74f951ed645c3cd604b8fa2173f142
ia64
sssd-1.5.1-37.el5.ia64.rpm	SHA-256: eec24de2460ae363423782c41f8674b484a69e2a57bb6af4e54ffde0a72c0486
sssd-client-1.5.1-37.el5.i386.rpm	SHA-256: a9a416189b1e8d5df4116a184cb411c6b69792101524916b22a3cfc0400c4039
sssd-client-1.5.1-37.el5.ia64.rpm	SHA-256: d4c27ef1252a09e5f0019a6cdc13459c41a78dc6e1c73e988403ab8c4032efbe
sssd-tools-1.5.1-37.el5.ia64.rpm	SHA-256: b0b1128ca722ec2441b7ebd891d8434efb0927e5ab89845a726d2a8bdfe48e99
i386
sssd-1.5.1-37.el5.i386.rpm	SHA-256: 80da177faf4565d7853b767969b91f81fc565f7e9e0af768ec8bfd6efcba5295
sssd-client-1.5.1-37.el5.i386.rpm	SHA-256: a9a416189b1e8d5df4116a184cb411c6b69792101524916b22a3cfc0400c4039
sssd-tools-1.5.1-37.el5.i386.rpm	SHA-256: 569001134c1f71ed133fea516d2b4c67f51936ca12773e9f530c6ed049cd784e

Red Hat Enterprise Linux Workstation 5

SRPM
sssd-1.5.1-37.el5.src.rpm	SHA-256: ebdf36a04aafabca61cc8f5e2466e3034f0966ca86cc11695b8267929f2bfda6
x86_64
sssd-1.5.1-37.el5.x86_64.rpm	SHA-256: 04715084960ea4979bad2c7ac4581456e868567d45c0dada3fd3cdd829dd6a77
sssd-client-1.5.1-37.el5.i386.rpm	SHA-256: a9a416189b1e8d5df4116a184cb411c6b69792101524916b22a3cfc0400c4039
sssd-client-1.5.1-37.el5.x86_64.rpm	SHA-256: 34d8fcecb507676abaaad72f8644fd85abc9444c5f8f052cdda0fa50fd3a9e75
sssd-tools-1.5.1-37.el5.x86_64.rpm	SHA-256: a72bf5880466d93c1647a187c7e311c90b74f951ed645c3cd604b8fa2173f142
i386
sssd-1.5.1-37.el5.i386.rpm	SHA-256: 80da177faf4565d7853b767969b91f81fc565f7e9e0af768ec8bfd6efcba5295
sssd-client-1.5.1-37.el5.i386.rpm	SHA-256: a9a416189b1e8d5df4116a184cb411c6b69792101524916b22a3cfc0400c4039
sssd-tools-1.5.1-37.el5.i386.rpm	SHA-256: 569001134c1f71ed133fea516d2b4c67f51936ca12773e9f530c6ed049cd784e

Red Hat Enterprise Linux Desktop 5

SRPM
sssd-1.5.1-37.el5.src.rpm	SHA-256: ebdf36a04aafabca61cc8f5e2466e3034f0966ca86cc11695b8267929f2bfda6
x86_64
sssd-1.5.1-37.el5.x86_64.rpm	SHA-256: 04715084960ea4979bad2c7ac4581456e868567d45c0dada3fd3cdd829dd6a77
sssd-client-1.5.1-37.el5.i386.rpm	SHA-256: a9a416189b1e8d5df4116a184cb411c6b69792101524916b22a3cfc0400c4039
sssd-client-1.5.1-37.el5.x86_64.rpm	SHA-256: 34d8fcecb507676abaaad72f8644fd85abc9444c5f8f052cdda0fa50fd3a9e75
sssd-tools-1.5.1-37.el5.x86_64.rpm	SHA-256: a72bf5880466d93c1647a187c7e311c90b74f951ed645c3cd604b8fa2173f142
i386
sssd-1.5.1-37.el5.i386.rpm	SHA-256: 80da177faf4565d7853b767969b91f81fc565f7e9e0af768ec8bfd6efcba5295
sssd-client-1.5.1-37.el5.i386.rpm	SHA-256: a9a416189b1e8d5df4116a184cb411c6b69792101524916b22a3cfc0400c4039
sssd-tools-1.5.1-37.el5.i386.rpm	SHA-256: 569001134c1f71ed133fea516d2b4c67f51936ca12773e9f530c6ed049cd784e

Red Hat Enterprise Linux for IBM z Systems 5

SRPM
sssd-1.5.1-37.el5.src.rpm	SHA-256: ebdf36a04aafabca61cc8f5e2466e3034f0966ca86cc11695b8267929f2bfda6
s390x
sssd-1.5.1-37.el5.s390x.rpm	SHA-256: 0b89a2e300e5aa7c43e512bc62ad9173e49b07a4515a1b9d4e552c8c824cf95a
sssd-client-1.5.1-37.el5.s390.rpm	SHA-256: 02fa3622ac7c0f8867dd6fb2ab72e5107f8344335ab94d21cfd0af863b9674bd
sssd-client-1.5.1-37.el5.s390x.rpm	SHA-256: 4bee3e41b428ddc5fd9f2e60044c75c1cdbf64e575d34cdff5332b02b0b47ecd
sssd-tools-1.5.1-37.el5.s390x.rpm	SHA-256: eb9fc4cac2b190ee916d01d5356279672020a856cab06750013f1be4879d1911

Red Hat Enterprise Linux for Power, big endian 5

SRPM
sssd-1.5.1-37.el5.src.rpm	SHA-256: ebdf36a04aafabca61cc8f5e2466e3034f0966ca86cc11695b8267929f2bfda6
ppc
sssd-1.5.1-37.el5.ppc.rpm	SHA-256: c38bb1b55ebd1f4abfb6b37c0c17719c3b723e5fdf91047335cb5e80dd8d7d8f
sssd-client-1.5.1-37.el5.ppc.rpm	SHA-256: 29fd205a834d7d1de6ac2f660bc860369f28a815132f7d4cb7748c5a395b9532
sssd-client-1.5.1-37.el5.ppc64.rpm	SHA-256: bdf3f9a9bc68cab8b1ad4e1b877ec1b0eaa9a892e71cc5553128ee01b94593d6
sssd-tools-1.5.1-37.el5.ppc.rpm	SHA-256: 195093fd11626ef01b0d75b28d0d7e46853076b3feb5522621362b20fe2afccb

Red Hat Enterprise Linux Server from RHUI 5

SRPM
sssd-1.5.1-37.el5.src.rpm	SHA-256: ebdf36a04aafabca61cc8f5e2466e3034f0966ca86cc11695b8267929f2bfda6
x86_64
sssd-1.5.1-37.el5.x86_64.rpm	SHA-256: 04715084960ea4979bad2c7ac4581456e868567d45c0dada3fd3cdd829dd6a77
sssd-client-1.5.1-37.el5.i386.rpm	SHA-256: a9a416189b1e8d5df4116a184cb411c6b69792101524916b22a3cfc0400c4039
sssd-client-1.5.1-37.el5.x86_64.rpm	SHA-256: 34d8fcecb507676abaaad72f8644fd85abc9444c5f8f052cdda0fa50fd3a9e75
sssd-tools-1.5.1-37.el5.x86_64.rpm	SHA-256: a72bf5880466d93c1647a187c7e311c90b74f951ed645c3cd604b8fa2173f142
i386
sssd-1.5.1-37.el5.i386.rpm	SHA-256: 80da177faf4565d7853b767969b91f81fc565f7e9e0af768ec8bfd6efcba5295
sssd-client-1.5.1-37.el5.i386.rpm	SHA-256: a9a416189b1e8d5df4116a184cb411c6b69792101524916b22a3cfc0400c4039
sssd-tools-1.5.1-37.el5.i386.rpm	SHA-256: 569001134c1f71ed133fea516d2b4c67f51936ca12773e9f530c6ed049cd784e