CVE-2023-6340 Memory corruption in Capture Client
A stack-based buffer overflow in the sfpmonitor.sys driver allows attackers to cause a denial of service in SonicWall Capture Client and NetExtender.
- 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-2023-6340?
CVE-2023-6340 is a medium-severity memory corruption vulnerability in SonicWall Capture Client, published on 17 Jan 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
SonicWall Capture Client version 3.7.10, NetExtender client version 10.2.337 and earlier versions are installed with sfpmonitor.sys driver. The driver has been found to be vulnerable to Denial-of-Service (DoS) caused by Stack-based Buffer Overflow vulnerability.
Which versions are affected by CVE-2023-6340?
It affects 2 products.
Products include Sonicwall Capture Client, Sonicwall Netextender.
How do I fix CVE-2023-6340?
No fix has been published for CVE-2023-6340 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-2023-6340 being exploited?
There is no known exploitation of CVE-2023-6340 in the wild and no public exploit code.
Sources
Also known as GHSA-pvh3-5rhh-wcg5.