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CVE-2016-6558: A command injection vulnerability exists in apply.cgi on the ASUS RP-AC52 access point, firmware version…

CVE-2016-6558 is rated critical with a CVSS v3.0 base score of 9.8 and NVD lists 7 affected products, including Asus Rp Ac52 Firmware. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

A command injection vulnerability exists in apply.cgi on the ASUS RP-AC52 access point, firmware version 1.0.1.1s and possibly earlier, web interface specifically in the action_script parameter. The action_script parameter specifies a script to be executed if the action_mode parameter does not contain a valid state. If the input provided by action_script does not match one of the hard coded options, then it will be executed as the argument of either a system() or an eval() call allowing arbitrary commands to be executed.

Severity breakdown

CVSS v3.0 9.8: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Unchanged. Impact stays within the vulnerable component.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-77: Improper Neutralization of Special Elements used in a Command

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

Affected products

  • Asus Rp Ac52 Firmware: up to and including 1.0.1.1s
  • Asus Ea N66 Firmware: all versions listed by NVD
  • Asus Rp N12 Firmware: all versions listed by NVD
  • Asus Rp N14 Firmware: all versions listed by NVD
  • Asus Rp N53 Firmware: all versions listed by NVD
  • Asus Rp Ac56 Firmware: all versions listed by NVD
  • Asus Wmp N12 Firmware: all versions listed by NVD

References