Synopsis

Moderate: nss_ldap security update

Type/Severity

Security Advisory: Moderate

Topic

Updated nss_ldap packages that fix a security flaw are now available for
Red Hat Enterprise Linux 4.

This update has been rated as having moderate security impact by the Red Hat
Security Response Team.

Description

nss_ldap is a set of C library extensions that allow X.500 and LDAP
directory servers to be used as primary sources for aliases, ethers,
groups, hosts, networks, protocols, users, RPCs, services, and shadow
passwords.

A flaw was found in the way nss_ldap handled a PasswordPolicyResponse
control sent by an LDAP server. If an LDAP server responded to an
authentication request with a PasswordPolicyResponse control, it was
possible for an application using nss_ldap to improperly authenticate
certain users. (CVE-2006-5170)

This flaw was only exploitable within applications which did not properly
process nss_ldap error messages. Only xscreensaver is currently known to
exhibit this behavior.

All users of nss_ldap should upgrade to these updated packages, which
contain a backported patch that resolves this issue.

Solution

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

This update is available via Red Hat Network. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

Affected Products

• Red Hat Enterprise Linux Server 4 x86_64
• Red Hat Enterprise Linux Server 4 ia64
• Red Hat Enterprise Linux Server 4 i386
• Red Hat Enterprise Linux Workstation 4 x86_64
• Red Hat Enterprise Linux Workstation 4 ia64
• Red Hat Enterprise Linux Workstation 4 i386
• Red Hat Enterprise Linux Desktop 4 x86_64
• Red Hat Enterprise Linux Desktop 4 i386
• Red Hat Enterprise Linux for IBM z Systems 4 s390x
• Red Hat Enterprise Linux for IBM z Systems 4 s390
• Red Hat Enterprise Linux for Power, big endian 4 ppc

Fixes

• BZ - 207286 - CVE-2006-5170 When using LDAP for authentication, xscreensaver allows access if account locked out.

CVEs

• CVE-2006-5170

References

• http://www.redhat.com/security/updates/classification/#moderate

Red Hat Enterprise Linux Server 4

SRPM
nss_ldap-226-17.src.rpm	SHA-256: 09c705d9ba1632a63cc632b280644fba2fe0a27dba9b8d69d2816690980fb201
x86_64
nss_ldap-226-17.i386.rpm	SHA-256: 5893c6cbf978ace08b0d7455d493ecff646b630d4cc95d13f9b1ecdc655841bf
nss_ldap-226-17.i386.rpm	SHA-256: 5893c6cbf978ace08b0d7455d493ecff646b630d4cc95d13f9b1ecdc655841bf
nss_ldap-226-17.x86_64.rpm	SHA-256: 88994c783db354f916bca2d2df8ad22b242e6007b7bd960a573684a2b811f531
nss_ldap-226-17.x86_64.rpm	SHA-256: 88994c783db354f916bca2d2df8ad22b242e6007b7bd960a573684a2b811f531
ia64
nss_ldap-226-17.i386.rpm	SHA-256: 5893c6cbf978ace08b0d7455d493ecff646b630d4cc95d13f9b1ecdc655841bf
nss_ldap-226-17.i386.rpm	SHA-256: 5893c6cbf978ace08b0d7455d493ecff646b630d4cc95d13f9b1ecdc655841bf
nss_ldap-226-17.ia64.rpm	SHA-256: 4675a69991632dda894124ba65fad12fc1d84c893b8b1c8b7474fe4cd1bc4288
nss_ldap-226-17.ia64.rpm	SHA-256: 4675a69991632dda894124ba65fad12fc1d84c893b8b1c8b7474fe4cd1bc4288
i386
nss_ldap-226-17.i386.rpm	SHA-256: 5893c6cbf978ace08b0d7455d493ecff646b630d4cc95d13f9b1ecdc655841bf
nss_ldap-226-17.i386.rpm	SHA-256: 5893c6cbf978ace08b0d7455d493ecff646b630d4cc95d13f9b1ecdc655841bf

Red Hat Enterprise Linux Workstation 4

SRPM
nss_ldap-226-17.src.rpm	SHA-256: 09c705d9ba1632a63cc632b280644fba2fe0a27dba9b8d69d2816690980fb201
x86_64
nss_ldap-226-17.i386.rpm	SHA-256: 5893c6cbf978ace08b0d7455d493ecff646b630d4cc95d13f9b1ecdc655841bf
nss_ldap-226-17.x86_64.rpm	SHA-256: 88994c783db354f916bca2d2df8ad22b242e6007b7bd960a573684a2b811f531
ia64
nss_ldap-226-17.i386.rpm	SHA-256: 5893c6cbf978ace08b0d7455d493ecff646b630d4cc95d13f9b1ecdc655841bf
nss_ldap-226-17.ia64.rpm	SHA-256: 4675a69991632dda894124ba65fad12fc1d84c893b8b1c8b7474fe4cd1bc4288
i386
nss_ldap-226-17.i386.rpm	SHA-256: 5893c6cbf978ace08b0d7455d493ecff646b630d4cc95d13f9b1ecdc655841bf

Red Hat Enterprise Linux Desktop 4

SRPM
nss_ldap-226-17.src.rpm	SHA-256: 09c705d9ba1632a63cc632b280644fba2fe0a27dba9b8d69d2816690980fb201
x86_64
nss_ldap-226-17.i386.rpm	SHA-256: 5893c6cbf978ace08b0d7455d493ecff646b630d4cc95d13f9b1ecdc655841bf
nss_ldap-226-17.x86_64.rpm	SHA-256: 88994c783db354f916bca2d2df8ad22b242e6007b7bd960a573684a2b811f531
i386
nss_ldap-226-17.i386.rpm	SHA-256: 5893c6cbf978ace08b0d7455d493ecff646b630d4cc95d13f9b1ecdc655841bf

Red Hat Enterprise Linux for IBM z Systems 4

SRPM
nss_ldap-226-17.src.rpm	SHA-256: 09c705d9ba1632a63cc632b280644fba2fe0a27dba9b8d69d2816690980fb201
s390x
nss_ldap-226-17.s390.rpm	SHA-256: ae60075fb9af8e4f2c77ac5d7c834c8ab44de9080fe47d8c61f6ffc30d267eeb
nss_ldap-226-17.s390x.rpm	SHA-256: c3dfa9d14d0f1584833ce3269b277b879a274fd2318d2df66a2d424b5adf5f97
s390
nss_ldap-226-17.s390.rpm	SHA-256: ae60075fb9af8e4f2c77ac5d7c834c8ab44de9080fe47d8c61f6ffc30d267eeb

Red Hat Enterprise Linux for Power, big endian 4

SRPM
nss_ldap-226-17.src.rpm	SHA-256: 09c705d9ba1632a63cc632b280644fba2fe0a27dba9b8d69d2816690980fb201
ppc
nss_ldap-226-17.ppc.rpm	SHA-256: b5a039c421f373e1c7e369526275f88b1e62314e64d0372f042db8b5281a0557
nss_ldap-226-17.ppc64.rpm	SHA-256: ccdf138e3148f30912e831b2a82b1eca8d2a6039789a2f6c01d41979749a2121