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Mandriva Linux Security Advisory 2008-004

Mandriva Linux Security Advisory 2008-004
Posted Jan 9, 2008
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory - Index Functions Privilege Escalation: as a unique feature, PostgreSQL allows users to create indexes on the results of user-defined functions, known as expression indexes. This provided two vulnerabilities to privilege escalation: (1) index functions were executed as the superuser and not the table owner during VACUUM and ANALYZE, and (2) that SET ROLE and SET SESSION AUTHORIZATION were permitted within index functions. Regular Expression Denial-of-Service: three separate issues in the regular expression libraries used by PostgreSQL allowed malicious users to initiate a denial-of-service by passing certain regular expressions in SQL queries. First, users could create infinite loops using some specific regular expressions. Second, certain complex regular expressions could consume excessive amounts of memory. Third, out-of-range backref numbers could be used to crash the backend. DBLink Privilege Escalation: DBLink functions combined with local trust or ident authentication could be used by a malicious user to gain superuser privileges. This issue has been fixed, and does not affect users who have not installed DBLink (an optional module), or who are using password authentication for local access. This same problem was addressed in the previous release cycle , but that patch failed to close all forms of the loophole.

tags | advisory, local, vulnerability
systems | linux, mandriva
advisories | CVE-2007-6600, CVE-2007-4772, CVE-2007-6067, CVE-2007-4769, CVE-2007-6601
SHA-256 | edab60a1473e35b9b319cf42931a033907dbd44cba5d3b178ce486cce8517747

Mandriva Linux Security Advisory 2008-004

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_______________________________________________________________________

Mandriva Linux Security Advisory MDVSA-2008:004
http://www.mandriva.com/security/
_______________________________________________________________________

Package : postgresql
Date : January 9, 2008
Affected: .
_______________________________________________________________________

Problem Description:

Index Functions Privilege Escalation (CVE-2007-6600): as a unique
feature, PostgreSQL allows users to create indexes on the results of
user-defined functions, known as expression indexes. This provided
two vulnerabilities to privilege escalation: (1) index functions were
executed as the superuser and not the table owner during VACUUM and
ANALYZE, and (2) that SET ROLE and SET SESSION AUTHORIZATION were
permitted within index functions.

Regular Expression Denial-of-Service (CVE-2007-4772, CVE-2007-6067,
CVE-2007-4769): three separate issues in the regular expression
libraries used by PostgreSQL allowed malicious users to initiate
a denial-of-service by passing certain regular expressions in SQL
queries. First, users could create infinite loops using some specific
regular expressions. Second, certain complex regular expressions
could consume excessive amounts of memory. Third, out-of-range backref
numbers could be used to crash the backend.

DBLink Privilege Escalation (CVE-2007-6601): DBLink functions
combined with local trust or ident authentication could be used by
a malicious user to gain superuser privileges. This issue has been
fixed, and does not affect users who have not installed DBLink (an
optional module), or who are using password authentication for local
access. This same problem was addressed in the previous release cycle
(see CVE-2007-3278), but that patch failed to close all forms of
the loophole.

Updated packages fix these issues by upgrading to the latest
maintenance versions of PostgreSQL.
_______________________________________________________________________

References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4769
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4772
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6067
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6600
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6601
_______________________________________________________________________

Updated Packages:


_______________________________________________________________________

To upgrade automatically use MandrivaUpdate or urpmi. The verification
of md5 checksums and GPG signatures is performed automatically for you.

All packages are signed by Mandriva for security. You can obtain the
GPG public key of the Mandriva Security Team by executing:

gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98

You can view other update advisories for Mandriva Linux at:

http://www.mandriva.com/security/advisories

If you want to report vulnerabilities, please contact

security_(at)_mandriva.com
_______________________________________________________________________

Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Mandriva Security Team
<security*mandriva.com>
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