Vigil@nce: Linux kernel, memory corruption of vDSO
November 2008 by Vigil@nce
A local attacker can create a memory corruption in vDSO in order to generate a denial of service or to elevate his privileges.
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
Red Hat Enterprise Linux
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.
Identifiers: 460251, BID-32099, CVE-2008-3527, RHSA-2008:0957-02, VIGILANCE-VUL-8219