Actu
Vigil@nce: Linux kernel, memory corruption of vDSO
November 2008 by Vigil@nce
SYNTHESIS
A local attacker can create a memory corruption in vDSO in order
to generate a denial of service or to elevate his privileges.
Gravity: 2/4
Consequences: administrator access/rights, denial of service of
computer
Provenance: user shell
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: 04/11/2008
IMPACTED PRODUCTS
– Linux kernel
– Red Hat Enterprise Linux
DESCRIPTION
The vDSO (Virtual Dynamic Shared Objects) page configures system
calls for user processes.
The arch/i386/kernel/sysenter.c file implements vDSO. However, the
syscall_nopage() function does not check received parameters.
A local attacker can therefore corrupt the memory in order to
generate a denial of service or to elevate his privileges.
CHARACTERISTICS
Identifiers: 460251, BID-32099, CVE-2008-3527, RHSA-2008:0957-02,
VIGILANCE-VUL-8219
