Rapid7 Vulnerability & Exploit Database

RHSA-2011:1378: postgresql84 security update

Back to Search

RHSA-2011:1378: postgresql84 security update



PostgreSQL is an advanced object-relational database management system(DBMS).A signedness issue was found in the way the crypt() function in thePostgreSQL pgcrypto module handled 8-bit characters in passwords when usingBlowfish hashing. Up to three characters immediately preceding a non-ASCIIcharacter (one with the high bit set) had no effect on the hash result,thus shortening the effective password length. This made brute-forceguessing more efficient as several different passwords were hashed to thesame value. (CVE-2011-2483)Note: Due to the CVE-2011-2483 fix, after installing this update some usersmay not be able to log in to applications that store user passwords, hashedwith Blowfish using the PostgreSQL crypt() function, in a back-endPostgreSQL database. Unsafe processing can be re-enabled for specificpasswords (allowing affected users to log in) by changing their hash prefixto "$2x$".These updated postgresql84 packages upgrade PostgreSQL to version 8.4.9.Refer to the PostgreSQL Release Notes for a full list of changes:http://www.postgresql.org/docs/8.4/static/release.htmlAll PostgreSQL users are advised to upgrade to these updated packages,which correct this issue. If the postgresql service is running, it will beautomatically restarted after installing this update.


  • redhat-upgrade-postgresql84
  • redhat-upgrade-postgresql84-contrib
  • redhat-upgrade-postgresql84-devel
  • redhat-upgrade-postgresql84-docs
  • redhat-upgrade-postgresql84-libs
  • redhat-upgrade-postgresql84-plperl
  • redhat-upgrade-postgresql84-plpython
  • redhat-upgrade-postgresql84-pltcl
  • redhat-upgrade-postgresql84-python
  • redhat-upgrade-postgresql84-server
  • redhat-upgrade-postgresql84-tcl
  • redhat-upgrade-postgresql84-test

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center