CVE-2012-10060: Sysax Multi Server versions prior to 5.55 contain a stack-based buffer overflow in its SSH service. When a remote attacker supplies an overly long username…

PriorityP272critical9.8CVSS 3.1

AVNACLPRNUINSUCHIHAH

EXPLOIT

EPSS

2.84%

84.9th percentile

Sysax Multi Server versions prior to 5.55 contain a stack-based buffer overflow in its SSH service. When a remote attacker supplies an overly long username during authentication, the server copies the input to a fixed-size stack buffer without proper bounds checking. This allows remote code execution under the context of the service.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
sysax	multi_server	< 5.55	5.55
sysax_software	multi_server	< 5.55	5.55

Detection & IOCsextracted from sources · hover to see the quote

urlhttps://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/ssh/sysax_ssh_username.rb↗

versionSysax Multi Server < 5.55↗

→Detect abnormally long SSH usernames sent to Sysax Multi Server during authentication — the overflow is triggered by an overly long username copied to a fixed-size stack buffer. ↗
→Monitor SSH authentication attempts to Sysax Multi Server (versions prior to 5.55) where the username field is excessively long, as this is the attack vector for remote code execution. ↗
→Note that versions before 5.53 are also affected; scope detection rules to cover all Sysax Multi Server SSH instances below 5.55. ↗

·The vulnerability is specific to the SSH service component of Sysax Multi Server; only deployments with SSH enabled are exposed to this remote code execution risk. ↗

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvdv4.09.3CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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