CVE-2023-0339 in Access Management Web Policy Agent
Summary
by MITRE • 02/28/2023
Relative Path Traversal vulnerability in ForgeRock Access Management Web Policy Agent allows Authentication Bypass.This issue affects Access Management Web Policy Agent: through 5.10.1.
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Analysis
by VulDB Data Team • 03/26/2023
The CVE-2023-0339 vulnerability represents a critical relative path traversal flaw within ForgeRock Access Management Web Policy Agent components, specifically impacting versions through 5.10.1. This vulnerability exists in the web policy agent's handling of user input and file path resolution mechanisms, creating a pathway for unauthorized access to protected resources. The flaw manifests when the agent processes requests that contain specially crafted relative path references, allowing attackers to manipulate the intended file access behavior. This vulnerability operates at the intersection of improper input validation and inadequate path resolution controls, creating a dangerous condition where legitimate authentication mechanisms can be circumvented through strategic manipulation of request parameters.
The technical exploitation of this vulnerability stems from the web policy agent's insufficient sanitization of user-supplied input that influences file system operations. When the agent processes authentication requests containing relative path traversal sequences such as ../ or ..\, it fails to properly validate or normalize these paths before using them in file access operations. This weakness creates a direct pathway for attackers to access files outside the intended directory boundaries, potentially enabling them to bypass authentication checks entirely. The vulnerability is classified under CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The flaw essentially allows an attacker to traverse the file system hierarchy and access resources that should remain protected, undermining the core security model of the access management system.
From an operational impact perspective, this vulnerability presents a severe threat to organizations relying on ForgeRock Access Management for their security infrastructure. An authenticated attacker could leverage this vulnerability to bypass authentication mechanisms and gain unauthorized access to protected applications and services, potentially leading to data breaches, privilege escalation, and system compromise. The bypass capability means that even users who have successfully authenticated through the normal process could be redirected to access resources without proper authorization. This vulnerability affects the fundamental trust model of the access management system, potentially allowing attackers to access sensitive configuration files, user data, or administrative interfaces that should remain protected. The impact extends beyond simple unauthorized access to include potential for lateral movement within the network and further exploitation of other system components.
Organizations should immediately implement mitigations including applying the vendor-provided patches and updates that address this specific path traversal vulnerability. The recommended approach involves configuring the web policy agent to properly validate and sanitize all input parameters before processing file system operations, implementing strict path normalization routines, and establishing proper input validation controls. Security teams should also consider implementing network-based controls such as web application firewalls that can detect and block suspicious path traversal patterns in real-time. Additional mitigations include restricting file system access permissions for the web policy agent processes, implementing monitoring for unusual file access patterns, and conducting thorough security assessments to identify any potential exploitation attempts. The vulnerability aligns with ATT&CK technique T1078 which covers valid accounts and privilege escalation, as successful exploitation would allow attackers to gain access to protected resources through bypassed authentication mechanisms, potentially enabling further malicious activities within the compromised environment.