RHSA-2006:0526 - Security Advisory

Topic

Updated postgresql packages that fix several security vulnerabilities are
now available for Red Hat Enterprise Linux 3 and 4.

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

Description

PostgreSQL is an advanced Object-Relational database management system
(DBMS).

A bug was found in the way PostgreSQL's PQescapeString function escapes
strings when operating in a multibyte character encoding. It is possible
for an attacker to provide an application a carefully crafted string
containing invalidly-encoded characters, which may be improperly escaped,
allowing the attacker to inject malicious SQL. While this update fixes how
PQescapeString operates, the PostgreSQL server has also been modified to
prevent such an attack occurring through unpatched clients.
(CVE-2006-2313, CVE-2006-2314). More details about this issue are
available in the linked PostgreSQL technical documentation.

An integer signedness bug was found in the way PostgreSQL generated
password salts. The actual salt size is only half the size of the expected
salt, making the process of brute forcing password hashes slightly easier.
This update will not strengthen already existing passwords, but all newly
assigned passwords will have the proper salt length. (CVE-2006-0591)

Users of PostgreSQL should upgrade to these updated packages containing
PostgreSQL version 7.4.13, which corrects these issues.

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 Server 3 x86_64
• Red Hat Enterprise Linux Server 3 ia64
• Red Hat Enterprise Linux Server 3 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 Workstation 3 x86_64
• Red Hat Enterprise Linux Workstation 3 ia64
• Red Hat Enterprise Linux Workstation 3 i386
• Red Hat Enterprise Linux Desktop 4 x86_64
• Red Hat Enterprise Linux Desktop 4 i386
• Red Hat Enterprise Linux Desktop 3 x86_64
• Red Hat Enterprise Linux Desktop 3 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 IBM z Systems 3 s390x
• Red Hat Enterprise Linux for IBM z Systems 3 s390
• Red Hat Enterprise Linux for Power, big endian 4 ppc
• Red Hat Enterprise Linux for Power, big endian 3 ppc

Fixes

• BZ - 180536 - CVE-2006-0591 postgresql pgcrypt minor salt generation flaw
• BZ - 192169 - CVE-2006-2313, CVE-2006-2314: PostgreSQL remote SQL injection vulnerability
• BZ - 192171 - CVE-2006-2313, CVE-2006-2314: PostgreSQL remote SQL injection vulnerability

CVEs

• CVE-2006-2314
• CVE-2006-0591
• CVE-2006-2313

References

• http://www.postgresql.org/docs/techdocs.52
• http://www.redhat.com/security/updates/classification/#important