CVE-2013-10065 Sysax Multi-Server <= 6.10 SSHD Key Exchange DoS

What is CVE-2013-10065?

CVE-2013-10065 is a high-severity denial of service vulnerability in Sysax Software Multi-Server, published on 5 Aug 2025. 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 Sysax Multi-Server version 6.10 via its SSH daemon. A specially crafted SSH key exchange packet can trigger a crash in the service, resulting in loss of availability. The flaw is triggered during the handling of malformed key exchange data, including a non-standard byte (\x28) in place of the expected SSH protocol delimiter.

Weakness: CWE-248

Which versions are affected by CVE-2013-10065?

It affects 1 product.

Products include Sysax Multi Server.

How do I fix CVE-2013-10065?

No fix has been published for CVE-2013-10065 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-2013-10065 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2013-10065 exists.

Public exploit code: 1 Metasploit module.

Other vulnerabilities in Sysax Software Multi-Server

• CVE-2012-10060 Sysax Multi Server < 5.55 SSH Username Buffer Overflow Critical 9.3
• CVE-2009-4790 Path traversal in n/a Critical 9.0
• CVE-2020-13229 Auth bypass in n/a High 8.8
• CVE-2024-53458 Denial of service in n/a High 7.5
• CVE-2012-6530 Memory corruption in n/a High 7.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-r9wj-gm7p-2529.