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Vigil@nce: PostgreSQL, memory corruption via substring

February 2010 by Vigil@nce

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

Consequences: privileged access/rights, denial of service of
service

Provenance: user account

Means of attack: 1 attack

Ability of attacker: technician (2/4)

Confidence: unique source (2/5)

Diffusion of the vulnerable configuration: high (3/3)

Creation date: 28/01/2010

IMPACTED PRODUCTS

 PostgreSQL

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.

CHARACTERISTICS

Identifiers: BID-37973, CVE-2010-0442, VIGILANCE-VUL-9388

http://vigilance.fr/vulnerability/PostgreSQL-memory-corruption-via-substring-9388


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