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Vigil@nce: Linux kernel, integer overflow via RDS

November 2010 by Vigil@nce

This bulletin was written by Vigil@nce : http://vigilance.fr/

SYNTHESIS OF THE VULNERABILITY

A local attacker can use a sendmsg() on an RDS socket, with a
large iovec array, in order to generate an integer overflow,
leading to a memory corruption.

 Severity: 2/4
 Creation date: 18/11/2010

DESCRIPTION OF THE VULNERABILITY

The RDS (Reliable Datagram Socket) protocol is used to transmit
data in a non connected mode. It is supported by kernels since
version 2.6.30.

The VIGILANCE-VUL-10086 (https://vigilance.fr/tree/1/10086)
vulnerability allows a local attacker to use sendmsg() on an RDS
socket, with a large iovec array, in order to generate an integer
overflow, leading to a memory corruption.

However, this vulnerability was partially corrected. The Linux
kernel is thus still vulnerable.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Linux-kernel-integer-overflow-via-RDS-10136


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