CVE-2014-125121

published 2025-07-31

CVE-2014-125121: Array Networks vAPV (version 8.3.2.17) and vxAG (version 9.2.0.34) appliances are affected by a privilege escalation vulnerability caused by a combination of…

Priority P2 70 critical 10 CVSS 4.0

AV N AC L AT N PR N UI N VC H VI H VA H SC H SI H SA H 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

EXPLOIT

Array Networks vAPV (version 8.3.2.17) and vxAG (version 9.2.0.34) appliances are affected by a privilege escalation vulnerability caused by a combination of hardcoded SSH credentials (or SSH private key) and insecure permissions on a startup script. The devices ship with a default SSH login or a hardcoded DSA private key, allowing an attacker to authenticate remotely with limited privileges.

Once authenticated, an attacker can overwrite the world-writable /ca/bin/monitor.sh script with arbitrary commands. Since this script is executed with elevated privileges through the backend binary, enabling the debug monitor via backend -c "debug monitor on" triggers execution of the attacker's payload as root. This allows full system compromise.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
array_networks	vapv	—	—
array_networks	vxag	—	—

Detection & IOCs extracted from sources · hover to see the quote

path /ca/bin/monitor.sh↗

command backend -c "debug monitor on"↗

process backend↗

• → Monitor for unauthorized writes or modifications to /ca/bin/monitor.sh, which is world-writable and can be overwritten by any authenticated user. ↗
• → Alert on execution of 'backend' binary with arguments enabling debug monitor, particularly 'backend -c "debug monitor on"', as this triggers privileged payload execution. ↗
• → Detect inbound SSH authentication attempts using hardcoded DSA private key or default credentials on Array Networks vAPV/vxAG appliances. ↗
• → Flag SSH logins to Array Networks appliances that result in a low-privilege shell followed shortly by execution of the backend setuid binary — this two-stage pattern is characteristic of this exploit chain. ↗

• · Affected versions are specifically vAPV 8.3.2.17 and vxAG 9.2.0.34; detection and remediation efforts should be scoped to these exact versions. ↗
• · The vulnerability requires two conditions to be present simultaneously: hardcoded SSH credentials (or DSA private key) AND insecure world-writable permissions on /ca/bin/monitor.sh. ↗
• · The backend binary runs as setuid, meaning any user who can invoke it can trigger privileged script execution — access controls on this binary are critical. ↗

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