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CVE-2022-27518: Citrix Application Delivery Controller (ADC) and Gateway Authentication Bypass Vulnerability

CVE-2022-27518 is rated critical with a CVSS v3.1 base score of 9.8 and affects Citrix Application Delivery Controller (ADC) and Gateway, along with 2 other products in NVD’s configuration data. 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. CISA added it to its Known Exploited Vulnerabilities catalog on 2022-12-13, which means exploitation in the wild has been observed.

Vulnerability description

Unauthenticated remote arbitrary code execution

Severity breakdown

CVSS v3.1 9.8: CVSS:3.1/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-664: Improper Control of a Resource Through its Lifetime

The product does not maintain or incorrectly maintains control over a resource throughout its lifetime of creation, use, and release.

Affected products

  • Citrix Application Delivery Controller Firmware: from 12.1 before 12.1-55.291; from 12.1 before 12.1-65.25; from 13.0 before 13.0-58.32
  • Citrix Gateway Firmware: from 12.1 before 12.1-65.25; from 13.0 before 13.0-58.32

References