TITLE:
PostgreSQL Privilege Escalation and Denial of Service

SECUNIA ADVISORY ID:
SA18890

VERIFY ADVISORY:
http://secunia.com/advisories/18890/

CRITICAL:
Less critical

IMPACT:
Privilege escalation, DoS

WHERE:
>From local network

SOFTWARE:
PostgreSQL 8.x
http://secunia.com/product/4587/
PostgreSQL 7.x
http://secunia.com/product/506/

DESCRIPTION:
Two vulnerabilities have been reported in PostgreSQL, which can be
exploited by malicious users to cause a DoS (Denial of Service) or
gain escalated privileges.

1) A validation error exists within the handling of the SET ROLE
command when restoring the previous role setting after an error. This
can be exploited by an authenticated user to gain superuser
privileges.

The vulnerability has been reported in the 8.1 branch.

2) An error in the SET SESSION AUTHORIZATION command can be exploited
to crash the server process, if it has been compiled with Asserts
enabled.

The vulnerability has been reported in the 7.3, 7.4, 8.0 and 8.1
branch.

SOLUTION:
Update to the fixed versions.
http://www.postgresql.org/download/

Version 7.3.x:
Update to version 7.3.14.

Version 7.4.x:
Update to version 7.4.12.

Version 8.0.x:
Update to version 8.0.7.

Version 8.1.x:
Update to version 8.1.3.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Akio Ishida.

ORIGINAL ADVISORY:
http://archives.postgresql.org/pgsql-announce/2006-02/msg00008.php
http://www.postgresql.org/docs/8.1/static/release-7-3-14.html
http://www.postgresql.org/docs/8.1/static/release-7-4-12.html
http://www.postgresql.org/docs/8.1/static/release-8-0-7.html
http://www.postgresql.org/docs/8.1/static/release.html#RELEASE-8-1-3

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