CVE-2020-20118 Memory corruption in n/a
A local attacker can cause a denial of service in Avast AntiVirus by exploiting a buffer overflow in the aswSnx.sys driver.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-20118?
CVE-2020-20118 is a medium-severity memory corruption vulnerability in n/a, published on 11 Jul 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-120
Which versions are affected by CVE-2020-20118?
It affects 1 product.
Products include Avast Antivirus.
How do I fix CVE-2020-20118?
No fix has been published for CVE-2020-20118 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-20118 being exploited?
There is no known exploitation of CVE-2020-20118 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2025-13032 Race condition in (Free/Inernet Security/Ultimate) Antivirus
- CVE-2020-10867 Security feature bypass in n/a
- CVE-2017-8307 Missing authorization in n/a
- CVE-2025-3500 Integer Overflow in Avast Antiviurs 25.1.981.6 on Windows may result in privilege escalation
- CVE-2021-45335 Missing authorization in n/a
Sources
Also known as GHSA-qjj5-85f7-r9rp.