CVE-2023-5748 Memory corruption in Synology SSL VPN Client

Low 3.3 Published 24 Oct 2023 Updated 17 Sep 2024

Local attackers can cause a denial of service in Synology SSL VPN Client via a buffer overflow in the CGI component.

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-2023-5748?

CVE-2023-5748 is a low-severity memory corruption vulnerability in Synology SSL VPN Client, published on 24 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Buffer copy without checking size of input ('Classic Buffer Overflow') vulnerability in cgi component in Synology SSL VPN Client before 1.4.7-0687 allows local users to conduct denial-of-service attacks via unspecified vectors.

Weakness: CWE-120

Which versions are affected by CVE-2023-5748?

It affects 1 product.

Products include Synology Ssl Vpn Client.

How do I fix CVE-2023-5748?

No fix has been published for CVE-2023-5748 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-2023-5748 being exploited?

There is no known exploitation of CVE-2023-5748 in the wild and no public exploit code.

Sources

Also known as GHSA-3744-988x-mqxh.