News
Vigil@nce: Linux kernel, memory corruption of pppol2tp_recvmsg
June 2008 by Vigil@nce
SYNTHESIS
An attacker can establish a L2TP session to create a denial of
service or eventually to execute code on the system.
Gravity: 2/4
Consequences: user access/rights
Provenance: intranet client
Means of attack: no proof of concept, no attack
Ability of attacker: expert (4/4)
Confidence: confirmed by the editor (5/5)
Diffusion of the vulnerable configuration: high (3/3)
Creation date: 17/06/2008
Identifier: VIGILANCE-VUL-7899
IMPACTED PRODUCTS
– Linux kernel [confidential versions]
DESCRIPTION
The pppol2tp_recvmsg() function of drivers/net/pppol2tp.c file
handles the reception of L2TP (PPP Over L2TP) messages.
However, if the size of a message is too long ("paged packets"),
the pppol2tp_recvmsg() function uses uninitialized values to alter
the memory.
An attacker can therefore establish a L2TP session to create a
denial of service or eventually to execute code on the system.
CHARACTERISTICS
Identifiers: BID-29747, VIGILANCE-VUL-7899
