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Vigil@nce - Linux kernel: memory leaks of net

November 2010 by Vigil@nce

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

SYNTHESIS OF THE VULNERABILITY

A local attacker can use network sockets, in order to read bytes
stored in the kernel memory.

Severity: 1/4

Creation date: 03/11/2010

DESCRIPTION OF THE VULNERABILITY

The Linux kernel implements several socket types: ax25 (radio),
packet (raw level), tipc (Transparent Inter Process
Communication). These types do not correctly initialize their data
before returning them to the user.

The ax25_getname() function does not fully initialize the
"fsa_digipeater" field of the "fsa" structure. [severity:1/4;
CVE-2010-3875]

The packet_getname_spkt() function does not fully initialize the
"sa_data" field of the "sockaddr" structure. [severity:1/4;
CVE-2010-3876]

The get_name() function does not initialize the padding of the
"sockaddr_tipc" structure. [severity:1/4; CVE-2010-3877]

A local attacker can therefore use network sockets, in order to
read bytes stored in the kernel memory.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Linux-kernel-memory-leaks-of-net-10096


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