SonicWall SMA100 Unauthenticated Directory Traversal
Actively exploited in the wild. Patch or mitigate immediately — don't wait for a maintenance window.
An unauthenticated attacker, remotely over the network, with no user interaction, can steal data.
In SonicWall SMA100, an unauthenticated Directory Traversal vulnerability in the handleWAFRedirect CGI allows the user to test for the presence of a file on the server.
Inferred from the weakness type (CWE) and how the flaw is reached — the techniques an attacker would chain to exploit this. Real-world corroboration appears here as threat intel is folded in.
Corroborated threat activity referencing this CVE — with source and confidence, not inference.
Named threat actors and observed ATT&CK techniques appear here as intel feeds are folded in — the ATT&CK chain above stays inferred until then.
Generated by Wavense from the CVE record — an immediate mitigation and the permanent fix.
Until a patch can be applied, restrict network access to the SonicWall SMA100's management interface to only trusted IP addresses or internal networks via firewall rules. Implement a Web Application Firewall (WAF) or Intrusion Prevention System (IPS) to detect and block common directory traversal sequences (e.g., '../', '..\') targeting the 'handleWAFRedirect' CGI. Increase logging verbosity and monitor for unusual access patterns or frequent error codes originating from this specific CGI.
The permanent resolution involves applying the vendor-provided security update to your SonicWall SMA100 appliance. Users should upgrade their firmware to version 8.2.0.7-27sv or any subsequent patched release as provided by SonicWall. Verify the successful application of the patch by checking the firmware version and reviewing device logs for any related errors or vulnerabilities.
An unauthenticated attacker can exploit this vulnerability to test for the existence of arbitrary files on the SonicWall SMA100 appliance's file system. This information disclosure can be leveraged for reconnaissance, potentially revealing sensitive configuration details, system files, or application components. Such knowledge can significantly aid in crafting more targeted attacks, including identifying potential vectors for further compromise or privilege escalation within the network.
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