A vulnerability in lighttpd could allow an unauthenticated, remote attacker to conduct a path traversal attack on a targeted system.
The vulnerability is due to insufficient sanitization of user-supplied input by the mod_alias_physical_handler function, as defined in the mod_alias source code file of the affected software. An attacker could exploit this vulnerability by passing crafted URL requests to the targeted system. A successful exploit could lead to a path traversal condition, allowing an attacker to access arbitrary files on the targeted system.
The vendor has confirmed the vulnerability and released updated software.
To exploit this vulnerability, the attacker must send a request that submits malicious input to the targeted system, making exploitation more difficult in environments that restrict network access from untrusted sources.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to run both firewall and antivirus applications to minimize the potential of inbound and outbound threats.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators can help protect affected systems from external attacks by using a solid firewall strategy.
Administrators are advised to monitor affected systems.
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.