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CriticalPublic exploit

Command Injection in Fujitsu ETERNUS CentricStor CS8000 Control Center (hw_view.php)

IdentifiersCVE-2022-31794CWE-78· Improper Neutralization of Special…

CVE-2022-31794 is a command injection vulnerability in the requestTempFile function of hw_view.php on Fujitsu ETERNUS CentricStor CS8000 Control Center devices prior to 8.1A SP02 P04. The vulnerability arises from insufficient sanitization of the unitName POST parameter, allowing attackers to inject shell metacharacters and execute arbitrary commands as the 'www-data' user. The flaw is accessible without authentication, and the affected script is directly reachable over the network.

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ANALYST BRIEF

Impact, mitigation & remediation

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Impact

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

Successful exploitation allows unauthenticated attackers to execute arbitrary commands as the 'www-data' user. Due to the appliance's outdated kernel, privilege escalation to root is trivial, granting full control over backup systems, including the ability to read, modify, or destroy virtual backup tapes. This can facilitate ransomware attacks by destroying backup data, severely impacting business continuity and data recovery.

Mitigation

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

Restrict network access to the appliance by blocking inbound traffic to ports 80 and 443, and limit access to the management LAN. As a temporary measure, bind the web interface to localhost and use SSH port forwarding for access. Note that such mitigations may void the product warranty. Monitor for suspicious activity and review access logs for signs of exploitation.

Remediation

Patch, then assume compromise.

Upgrade to Fujitsu ETERNUS CentricStor Control Center version 8.1A SP02 P04 or 8.0A SP01, which address the vulnerability. The patch must be requested directly from Fujitsu due to their software distribution model. Ensure the update is applied as soon as possible to mitigate risk.
PUBLIC EXPLOITS

Exploits

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VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

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VendorProductType
FujitsuEternus Cs8000 Firmwareoperating_system

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Threat actor evidence

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Associated malware1

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