Medium severity · published Jul 11, 2023
CVE-2020-20118
Buffer Overflow vulnerability in Avast AntiVirus before v.19.7 allows a local attacker to cause a denial of service via a crafted request to the aswSnx.sys driver
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
Buffer Overflow vulnerability in Avast AntiVirus before v.19.7 allows a local attacker to cause a denial of service via a crafted request to the aswSnx.sys driver.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 6% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AN
Antivirus · Avast
before 19.7 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-20118
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-20118
Patch
https://gitlab.com/yongchuank/avast-aswsnx-ioctl-82ac0060-oob-write
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