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
Oracle Database Server CVE-2009-1964 Vulnerability (CVE-2009-1964)
WordPress Plugin Social Photo Gallery Remote Code Execution (1.0)
MySQL CVE-2019-2531 Vulnerability (CVE-2019-2531)
MySQL CVE-2018-3060 Vulnerability (CVE-2018-3060)
Oracle HTTP Server Out-of-bounds Read Vulnerability (CVE-2020-26185)