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RHSA-2012:1036: postgresql security update

Severity CVSS Published Added Modified
4 (AV:N/AC:M/Au:N/C:N/I:P/A:N) June 25, 2012 June 28, 2012 July 04, 2017


PostgreSQL is an advanced object-relational database management system(DBMS).A flaw was found in the way the crypt() password hashing function from theoptional PostgreSQL pgcrypto contrib module performed passwordtransformation when used with the DES algorithm. If the password string tobe hashed contained the 0x80 byte value, the remainder of the string wasignored when calculating the hash, significantly reducing the passwordstrength. This made brute-force guessing more efficient as the wholepassword was not required to gain access to protected resources.(CVE-2012-2143)Note: With this update, the rest of the string is properly included in theDES hash; therefore, any previously stored password values that areaffected by this issue will no longer match. In such cases, it will benecessary for those stored password hashes to be updated.Upstream acknowledges Rubin Xu and Joseph Bonneau as the original reportersof this issue.All PostgreSQL users are advised to upgrade to these updated packages,which contain a backported patch to correct this issue. If the postgresqlservice is running, it will be automatically restarted after installingthis update.

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