Vulnerability CVE-2015-8620
Published: 2016-04-13

Description:
Heap-based buffer overflow in the Avast virtualization driver (aswSnx.sys) in Avast Internet Security, Pro Antivirus, Premier, and Free Antivirus before 11.1.2253 allows local users to gain privileges via a Unicode file path in an IOCTL request.

See advisories in our WLB2 database:
Topic
Author
Date
High
Avast 11.1.2245 Heap Overflow
Kyriakos Economo...
23.02.2016

Type:

CWE-119

 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

CVSS2 => (AV:N/AC:L/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
10/10
10/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Avast -> Avast free antivirus 
Avast -> Avast internet security 
Avast -> Avast premier 
Avast -> Avast pro antivirus 

 References:
https://www.nettitude.co.uk/exploiting-a-kernel-paged-pool-buffer-overflow-in-avast-virtualization-driver/
http://www.securitytracker.com/id/1035093
http://seclists.org/fulldisclosure/2016/Feb/94
http://packetstormsecurity.com/files/135859/Avast-11.1.2245-Heap-Overflow.html
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