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Vigil@nce - IBM Informix Dynamic Server: privilege elevation via COLLATION
October 2012 by Vigil@nce
This bulletin was written by Vigil@nce : http://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
A local attacker can use the SET COLLATION command of IBM Informix
Dynamic Server, in order to generate a buffer overflow, and to
execute code with privileges of the service.
Impacted products: Informix Dynamic Server
Severity: 2/4
Creation date: 25/09/2012
DESCRIPTION OF THE VULNERABILITY
The "SET COLLATION" SQL command is used to define the sorting
order of characters (most of the times, it depends on the locale).
For example :
SET COLLATION en_us.8859-1
However, if the parameter is too long, an overflow occurs.
A local attacker can therefore use the SET COLLATION command of
IBM Informix Dynamic Server, in order to generate a buffer
overflow, and to execute code with privileges of the service.
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