What’s Vulnerable › Vulnerabilities
CVE-2013-10065: Sysax Multi-Server <= 6.10 SSHD Key Exchange DoS
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.8% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2025-08-05 · updated 2026-06-16
- Weakness: CWE-248
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.
Affected products
References
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/auxiliary/dos/windows/ssh/sysax_sshd_kexchange.rb
- https://www.mattandreko.com/2013/04/08/sysax-multi-server-6.10-ssh-dos/
- https://www.sysax.com/
- https://www.vulncheck.com/advisories/sysax-multi-server-sshd-key-exchange-dos
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/auxiliary/dos/windows/ssh/sysax_sshd_kexchange.rb
- https://www.mattandreko.com/2013/04/08/sysax-multi-server-6.10-ssh-dos/
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