CWE-553: Command Shell in Externally Accessible Directory

What is Command Shell in Externally Accessible Directory?

• Overview: Command Shell in Externally Accessible Directory (CWE-553) involves having shell files located in publicly accessible directories like /cgi-bin/. This vulnerability allows attackers to execute arbitrary commands on the server, leading to severe security risks.

• Exploitation Methods:

• Attackers can access these shell files through web requests and execute commands remotely.
• Common attack patterns include using web shells to gain unauthorized access and control over the server.

• Security Impact:

• Direct consequences include unauthorized command execution and potential server compromise.
• Potential cascading effects involve data breaches, system downtime, and further exploitation of network resources.
• Business impact includes loss of sensitive data, damage to reputation, and financial losses due to service disruption.

• Prevention Guidelines:

• Specific code-level fixes include removing any shell files or executable scripts from publicly accessible directories.
• Security best practices involve implementing strict access controls and regularly auditing server directories for unauthorized files.
• Recommended tools and frameworks include using web application firewalls (WAFs) and security monitoring tools to detect and block unauthorized access attempts.

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Technical Details

Likelihood of Exploit: Not specified

Affected Languages: Not specified

Affected Technologies: Not specified