CVE-2024-26029: Adobe Experience Manager Auth Bypass Flaw

CVE-2024-26029 Overview

CVE-2024-26029 is a critical Improper Access Control vulnerability affecting Adobe Experience Manager (AEM), one of the most widely deployed enterprise content management systems. This vulnerability enables attackers to bypass security measures and gain unauthorized access to sensitive information without requiring any user interaction.

Adobe Experience Manager versions 6.5.20 and earlier, along with AEM Cloud Service deployments, are susceptible to this security bypass. The flaw allows remote attackers to circumvent access control mechanisms, potentially exposing confidential enterprise data managed within AEM environments.

Critical Impact

This vulnerability allows unauthenticated remote attackers to bypass security features and access protected information in Adobe Experience Manager deployments, requiring no user interaction for exploitation.

Affected Products

• Adobe Experience Manager versions 6.5.20 and earlier
• Adobe Experience Manager AEM Cloud Service

Discovery Timeline

• 2024-06-13 - CVE-2024-26029 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2024-26029

Vulnerability Analysis

This vulnerability stems from Improper Access Control (CWE-284) within Adobe Experience Manager's security implementation. The flaw enables attackers to bypass authentication and authorization mechanisms designed to protect sensitive content and administrative functions.

The vulnerability is particularly concerning due to its network-exploitable nature and the absence of any prerequisite conditions for exploitation. Attackers require no prior authentication, no elevated privileges, and no user interaction to successfully exploit this vulnerability. This combination of factors significantly increases the risk profile for organizations running vulnerable AEM instances.

When successfully exploited, attackers can bypass security features intended to restrict access to protected resources, leading to unauthorized information disclosure. Given AEM's role as an enterprise content management platform, this could expose confidential business documents, customer data, marketing assets, and potentially administrative configurations.

Root Cause

The root cause of CVE-2024-26029 is an Improper Access Control implementation within Adobe Experience Manager. The vulnerability exists because the application fails to properly enforce access restrictions on certain resources or functions, allowing unauthorized users to access protected content or functionality that should require proper authentication or authorization.

This type of flaw typically occurs when access control checks are missing, improperly implemented, or can be bypassed through specific request patterns. In the context of AEM, this could manifest in servlet endpoints, content paths, or API interfaces that lack adequate validation of user permissions.

Attack Vector

The attack vector for CVE-2024-26029 is network-based, meaning attackers can exploit this vulnerability remotely over the network without requiring local access to the target system. The exploitation characteristics include:

• No authentication required: Attackers do not need valid credentials to exploit this vulnerability
• No user interaction needed: The vulnerability can be exploited without any action from legitimate users
• Low attack complexity: Exploitation does not require specialized conditions or extensive technical expertise

An attacker targeting a vulnerable AEM instance would craft requests designed to bypass access control mechanisms, potentially accessing restricted content, administrative endpoints, or sensitive configuration data. The vulnerability manifests through improper validation of access permissions, allowing unauthorized operations to succeed where they should be denied.

Detection Methods for CVE-2024-26029

Indicators of Compromise

• Unusual access patterns to AEM administrative endpoints or protected content paths from unauthorized sources
• HTTP requests attempting to access restricted AEM resources without proper session tokens or authentication headers
• Unexpected information disclosure events logged in AEM audit trails
• Access attempts to sensitive content paths from external or untrusted IP addresses

Detection Strategies

• Monitor AEM access logs for requests to protected resources that succeed without valid authentication
• Implement web application firewall (WAF) rules to detect and block suspicious access patterns targeting AEM
• Review AEM audit logs for unauthorized content access or security bypass attempts
• Deploy anomaly detection to identify unusual request patterns targeting AEM endpoints

Monitoring Recommendations

• Enable comprehensive logging for all AEM access control decisions and authentication events
• Configure real-time alerting for access attempts to administrative functions from unauthorized sources
• Monitor network traffic to AEM instances for reconnaissance activities or exploitation attempts
• Implement SIEM integration to correlate AEM security events with broader threat intelligence

How to Mitigate CVE-2024-26029

Immediate Actions Required

• Update Adobe Experience Manager to version 6.5.21 or later immediately
• Review the Adobe Experience Manager Security Advisory (APSB24-28) for specific patching instructions
• Conduct an audit of AEM access logs to identify any potential exploitation attempts prior to patching
• Restrict network access to AEM instances using firewall rules while awaiting patching

Patch Information

Adobe has addressed this vulnerability in security bulletin APSB24-28. Organizations should apply the latest security updates for Adobe Experience Manager as outlined in the official Adobe security advisory. For AEM Cloud Service deployments, Adobe applies updates automatically, but customers should verify their deployment status with Adobe support.

The patch corrects the improper access control implementation by enforcing proper authentication and authorization checks on affected endpoints and resources.

Workarounds

• Implement strict network segmentation to limit exposure of AEM instances to trusted networks only
• Deploy a web application firewall (WAF) with rules to enforce authentication on all AEM requests
• Configure AEM dispatcher rules to restrict access to sensitive paths and administrative endpoints
• Enable enhanced access logging and monitoring to detect exploitation attempts while awaiting patching