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CVE-2021-37415: Zoho ManageEngine ServiceDesk Authentication Bypass Vulnerability

CVE-2021-37415 is rated critical with a CVSS v3.1 base score of 9.8 and affects Zoho ManageEngine ServiceDesk Plus (SDP). 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 2021-12-01, which means exploitation in the wild has been observed.

Vulnerability description

Zoho ManageEngine ServiceDesk Plus before 11302 is vulnerable to authentication bypass that allows a few REST-API URLs without authentication.

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-306: Missing Authentication for Critical Functionality

The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

Affected products

  • Zohocorp Manageengine Servicedesk Plus: 11.0 11005; 11.0 11006; 11.0 11007; 11.0 11008; 11.0 11009; 11.0 11010; 11.0 11011; 11.1; 11.1 11100; 11.1 11101; 11.1 11102; 11.1 11103

References