vulnerability bulletin CVE-2010-0442

PostgreSQL: memory corruption via substring

Synthesis of the vulnerability

An authenticated attacker can use the substring() function, in order to generate a corruption, leading to a denial of service or to code execution with database privileges.

Severity: 2/4. Creation date: 28/01/2010.

Description of the vulnerability

The SQL substring() function extracts a character string. For example, to extract "ell" (from offset 2, with size 3) :   SELECT substring('Hello', 2, 3); A "Bit String" is a string containing 0 and 1 values. For example: B'101' When the substring() function is called on a Bit String, a memory corruption occurs. An authenticated attacker can therefore use the substring() function, in order to generate a corruption, leading to a denial of service or to code execution with database privileges.

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Characteristics

Title: PostgreSQL: memory corruption via substring. Keywords: 101 Bit Hello PostgreSQL SELECT SQL String corruption memory substring. Identifiers: BID-37973, CVE-2010-0442, DSA 2051-1, MDVSA-2010:103, RHSA-2010:0427-01, RHSA-2010:0428-01, RHSA-2010:0429-01, VIGILANCE-VUL-9388.

Information sources

Publications and announces Source example: PostgreSQL 8.0.23 bitsubstr overflow

Solutions for this vulnerability

Patch or workaround

Supplements

Attack Exploit 0day or proof of concept

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