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CVE-2018-9285: Main_Analysis_Content.asp in /apply.cgi on ASUS RT-AC66U, RT-AC68U, RT-AC86U, RT-AC88U, RT-AC1900…

CVE-2018-9285 is rated critical with a CVSS v3.0 base score of 9.8 and NVD lists 11 affected products, including Asus Rt Ac66u 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

Main_Analysis_Content.asp in /apply.cgi on ASUS RT-AC66U, RT-AC68U, RT-AC86U, RT-AC88U, RT-AC1900, RT-AC2900, and RT-AC3100 devices before 3.0.0.4.384_10007; RT-N18U devices before 3.0.0.4.382.39935; RT-AC87U and RT-AC3200 devices before 3.0.0.4.382.50010; and RT-AC5300 devices before 3.0.0.4.384.20287 allows OS command injection via the pingCNT and destIP fields of the SystemCmd variable.

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-78: Improper Neutralization of Special Elements used in an OS Command

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

Affected products

  • Asus Rt Ac66u Firmware: before 3.0.0.4.384.10007
  • Asus Rt Ac68u Firmware: before 3.0.0.4.384.10007
  • Asus Rt Ac86u Firmware: before 3.0.0.4.384.10007
  • Asus Rt Ac88u Firmware: before 3.0.0.4.384.10007
  • Asus Rt Ac1900 Firmware: before 3.0.0.4.384.10007
  • Asus Rt Ac2900 Firmware: before 3.0.0.4.384.10007
  • Asus Rt Ac3100 Firmware: before 3.0.0.4.384.10007
  • Asus Rt N18u Firmware: before 3.0.0.4.382.39935
  • Asus Rt Ac87u Firmware: before 3.0.0.4.382.50010
  • Asus Rt Ac3200 Firmware: before 3.0.0.4.382.50010
  • Asus Rt Ac5300 Firmware: before 3.0.0.4.384.20287

References