CVE-2023-22325 Denial of service in SoftEther VPN

Medium 5.9 Published 12 Oct 2023 Updated 2 Aug 2024

A remote attacker can cause a denial of service in SoftEther VPN by sending a specially crafted network packet via a man-in-the-middle attack.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-22325?

CVE-2023-22325 is a medium-severity denial of service vulnerability in SoftEther VPN, published on 12 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A denial of service vulnerability exists in the DCRegister DDNS_RPC_MAX_RECV_SIZE functionality of SoftEther VPN 4.41-9782-beta, 5.01.9674 and 5.02. A specially crafted network packet can lead to denial of service. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.

Weakness: CWE-835

Which versions are affected by CVE-2023-22325?

It affects 1 product.

Products include Softether Vpn.

How do I fix CVE-2023-22325?

No fix has been published for CVE-2023-22325 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2023-22325 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-22325 exists.

Sources

Also known as GHSA-93jh-7v3q-c8c6.