Description
Envoy 1.9.0 and before does not normalize HTTP URL paths. A remote attacker may craft a relative path, e.g., something/../admin, to bypass access control, e.g., a block on /admin. A backend server could then interpret the non-normalized path and provide an attacker access beyond the scope provided for by the access control policy.
Remediation
References
Related Vulnerabilities
Drupal Permissions, Privileges, and Access Controls Vulnerability (CVE-2010-3092)
PHP Data Processing Errors Vulnerability (CVE-2015-4026)
Piwigo Exposure of Resource to Wrong Sphere Vulnerability (CVE-2022-26267)
WordPress Plugin Gravity Forms Salesforce Cross-Site Scripting (1.2.4)
WebLogic Deserialization of Untrusted Data Vulnerability (CVE-2019-17267)