postgresql-7.4 - several

Several local vulnerabilities have been discovered in PostgreSQL, an
object-relational SQL database. The Common Vulnerabilities and Exposures
project identifies the following problems:

• CVE-2007-3278

It was discovered that the DBLink module performed insufficient
credential validation. This issue is also tracked as CVE-2007-6601,
since the initial upstream fix was incomplete.

• CVE-2007-4769

Tavis Ormandy and Will Drewry discovered that a bug in the handling
of back-references inside the regular expressions engine could lead
to an out of bounds read, resulting in a crash. This constitutes only
a security problem if an application using PostgreSQL processes
regular expressions from untrusted sources.

• CVE-2007-4772

Tavis Ormandy and Will Drewry discovered that the optimizer for regular
expression could be tricked into an infinite loop, resulting in denial
of service. This constitutes only a security problem if an application
using PostgreSQL processes regular expressions from untrusted sources.

• CVE-2007-6067

Tavis Ormandy and Will Drewry discovered that the optimizer for regular
expression could be tricked massive resource consumption. This
constitutes only a security problem if an application using PostgreSQL
processes regular expressions from untrusted sources.

• CVE-2007-6600

Functions in index expressions could lead to privilege escalation. For
a more in depth explanation please see the upstream announce available
at <http://www.postgresql.org/about/news.905&gt;.

For the old stable distribution (sarge), some of these problems have been
fixed in version 7.4.7-6sarge6 of the postgresql package. Please note that
the fix for CVE-2007-6600 and for the handling of regular expressions
havn’t been backported due to the intrusiveness of the fix. We recommend
to upgrade to the stable distribution if these vulnerabilities affect your
setup.

For the stable distribution (etch), these problems have been fixed in
version 7.4.19-0etch1.

The unstable distribution (sid) no longer contains postgres-7.4.

We recommend that you upgrade your postgresql-7.4 packages.