postgresql-8.4 - security update

Several vulnerabilities were discovered in PostgreSQL, a relational
database server system. The 8.4 branch is EOLed upstream, but still
present in Debian squeeze. This new LTS minor version contains the
fixes that were applied upstream to the 9.0.20 version, backported to
8.4.22 which was the last version officially released by the PostgreSQL
developers. This LTS effort for squeeze-lts is a community project
sponsored by credativ GmbH.

• CVE-2015-3165
  Remote crash
  SSL clients disconnecting just before the authentication timeout expires
  can cause the server to crash.
• CVE-2015-3166
  Information exposure
  The replacement implementation of snprintf() failed to check for errors
  reported by the underlying system library calls; the main case that
  might be missed is out-of-memory situations. In the worst case this
  might lead to information exposure.
• CVE-2015-3167
  Possible side-channel key exposure
  In contrib/pgcrypto, some cases of decryption with an incorrect key
  could report other error message texts. Fix by using a one-size-fits-all
  message.

Note that the next round of minor releases for PostgreSQL have already
been scheduled for early June 2015. There will be a corresponding
8.4.22lts3 update at the same time.