HighPublic exploit

Denial of Service in Sysax Multi-Server 6.10 SSH daemon

IdentifiersCVE-2013-10065CWE-20

CVE-2013-10065 is a denial-of-service vulnerability in the SSH daemon of Sysax Multi-Server version 6.10. The issue is triggered by sending a specially crafted SSH key exchange packet containing malformed key exchange data, specifically including a non-standard byte (\x28) where the SSH protocol parser expects a delimiter. Improper handling of this malformed key exchange input causes the SSH service to crash, leading to a loss of availability.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

A remote attacker can crash the Sysax Multi-Server SSH service by sending a malformed SSH key exchange packet during protocol negotiation. The resulting impact is denial of service against the SSH daemon, preventing legitimate users from establishing SSH sessions until the service is restarted or otherwise recovers. Based on the provided information, there is no evidence of code execution, privilege escalation, or data disclosure.

Mitigation

If you can’t patch tonight, do this now.

Restrict network access to the SSH service to trusted source IPs using host-based or perimeter firewalls, VPN-only access, or administrative network segmentation. Where possible, disable the Sysax SSH service if it is not required, or place it behind access controls that limit exposure to untrusted networks. Operationally, monitor the service for crashes and configure automatic service restart to reduce availability impact until a patch can be applied.

Remediation

Patch, then assume compromise.

Upgrade from Sysax Multi-Server version 6.10 to a fixed version if one is available from the vendor. If a vendor patch or updated release exists, apply it to eliminate the malformed key exchange handling flaw in the SSH daemon. If no fixed version information is currently available, contact the vendor for a security update or support guidance.

PUBLIC EXPLOITS

Exploits

1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.

VALID 1 / 1 TOTALView more in app

sysax_sshd_kexchange.rbMaturityWeaponizedFrameworkmetasploitVerified exploit

This repository contains a single Metasploit auxiliary module targeting a denial of service vulnerability (CVE-2013-10065) in Sysax Multi-Server 6.10's SSH service on Windows. The exploit works by sending a specially-crafted SSH key exchange packet to the target's SSH port (default 22), which causes the SSH service to crash. The module is written in Ruby and leverages Metasploit's auxiliary and remote TCP capabilities. The exploit does not provide code execution or shell access; its sole purpose is to crash the SSH service, resulting in a denial of service. The only fingerprintable endpoint is the TCP port 22, which is the standard SSH port. The repository structure is typical for a Metasploit module, with all logic contained in a single Ruby file.

Disclosed Mar 17, 2013rubynetwork

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

SysaxMulti Serverapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

5 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

5 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

What this page doesn’t show

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Exposure mapping

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Threat actor evidence

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Associated malware

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Detection signatures

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Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity5