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CVE-2022-29464: WSO2 Multiple Products Unrestrictive Upload of File Vulnerability

CVE-2022-29464 is rated critical with a CVSS v3.1 base score of 9.8 and affects WSO2 Multiple Products, along with 1 other product 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 2022-04-25, which means exploitation in the wild has been observed.

Vulnerability description

Certain WSO2 products allow unrestricted file upload with resultant remote code execution. The attacker must use a /fileupload endpoint with a Content-Disposition directory traversal sequence to reach a directory under the web root, such as a ../../../../repository/deployment/server/webapps directory. This affects WSO2 API Manager 2.2.0 up to 4.0.0, WSO2 Identity Server 5.2.0 up to 5.11.0, WSO2 Identity Server Analytics 5.4.0, 5.4.1, 5.5.0 and 5.6.0, WSO2 Identity Server as Key Manager 5.3.0 up to 5.11.0, WSO2 Enterprise Integrator 6.2.0 up to 6.6.0, WSO2 Open Banking AM 1.4.0 up to 2.0.0 and WSO2 Open Banking KM 1.4.0, up to 2.0.0.

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-22: Improper Limitation of a Pathname to a Restricted Directory

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Affected products

  • Wso2 API Manager: from 2.2.0 up to and including 4.0.0
  • Wso2 Enterprise Integrator: from 6.2.0 up to and including 6.6.0
  • Wso2 Identity Server: from 5.2.0 up to and including 5.11.0
  • Wso2 Identity Server Analytics: 5.4.0; 5.4.1; 5.5.0; 5.6.0
  • Wso2 Identity Server As Key Manager: from 5.3.0 up to and including 5.10.0
  • Wso2 Open Banking Am: from 1.3.0 up to and including 2.0.0
  • Wso2 Open Banking Km: from 1.3.0 up to and including 1.5.0
  • Wso2 Open Banking Iam: 2.0.0

References