CVE-2023-5760 Time-of-check to time-of-use (TOCTOU) bug leads to full local privilege escalation.
A TOCTOU race condition in Avast Antivirus allows local attackers to achieve full privilege escalation via an out-of-bounds write.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-5760?
CVE-2023-5760 is a high-severity vulnerability in Avast/Avg Antivirus, published on 8 Nov 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A time-of-check to time-of-use (TOCTOU) bug in handling of IOCTL (input/output control) requests. This TOCTOU bug leads to an out-of-bounds write vulnerability which can be further exploited, allowing an attacker to gain full local privilege escalation on the system.This issue affects Avast/Avg Antivirus: 23.8.
Weakness: CWE-367
Which versions are affected by CVE-2023-5760?
It affects 1 product.
Products include Avast Avg Antivirus.
How do I fix CVE-2023-5760?
No fix has been published for CVE-2023-5760 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-5760 being exploited?
There is no known exploitation of CVE-2023-5760 in the wild and no public exploit code.
Other vulnerabilities in Avast/Avg Antivirus
Sources
Also known as GHSA-c65v-cwf9-f69v.