CVE-2023-5593 Memory corruption in SecuExtender SSL VPN Client
An authenticated local user can escalate privileges via an out-of-bounds write in the Zyxel SecuExtender SSL VPN Client.
- 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-2023-5593?
CVE-2023-5593 is a high-severity memory corruption vulnerability in Zyxel SecuExtender SSL VPN Client, published on 20 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The out-of-bounds write vulnerability in the Windows-based SecuExtender SSL VPN Client software version 4.0.4.0 could allow an authenticated local user to gain a privilege escalation by sending a crafted CREATE message.
Weakness: CWE-787
Which versions are affected by CVE-2023-5593?
It affects 1 product.
Products include Zyxel Secuextender Ssl Vpn.
How do I fix CVE-2023-5593?
No fix has been published for CVE-2023-5593 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-2023-5593 being exploited?
There is no known exploitation of CVE-2023-5593 in the wild and no public exploit code.
Sources
Also known as GHSA-85wf-77c7-2h37.