High severity · published Apr 13, 2016
CVE-2015-8620
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…
7.8
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AF
Avast Free Antivirus · Avast
through 11.1.2245 · source: NVD
AI
Avast Internet Security · Avast
through 11.1.2245 · source: NVD
AP
Avast Premier · Avast
through 11.1.2245 · source: NVD
AP
Avast Pro Antivirus · Avast
through 11.1.2245 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2015-8620
CVE.org
https://www.cve.org/CVERecord?id=CVE-2015-8620
Exploit
http://packetstormsecurity.com/files/135859/Avast-11.1.2245-Heap-Overflow.html
Exploit
http://seclists.org/fulldisclosure/2016/Feb/94
Third Party Advisory
http://www.securitytracker.com/id/1035093
Exploit
https://www.nettitude.co.uk/exploiting-a-kernel-paged-pool-buffer-overflow-in-avast-virtualization-driver/