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Vigil@nce - Linux kernel: information disclosure via nf_nat_irc

February 2014 by Vigil@nce

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

SYNTHESIS OF THE VULNERABILITY

An attacker, who communicates via IRC, can obtain fragments of the
Linux kernel, in order to obtain sensitive information.

Impacted products: Linux, netfilter

Severity: 2/4

Creation date: 28/01/2014

DESCRIPTION OF THE VULNERABILITY

The NetFilter firewall supports the tracking of IRC connections
(NF_NAT_IRC).

However the help() function of the net/netfilter/nf_nat_irc.c file
does not initialize a memory area, before inserting it in the IRC
packet, which is then sent on the network.

An attacker, who communicates via IRC, can therefore obtain
fragments of the Linux kernel, in order to obtain sensitive
information.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Linux-kernel-information-disclosure-via-nf-nat-irc-14146


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