CVE-2019-3872 in JBoss Enterprise Application Platform
Summary
by MITRE
It was found that a SAMLRequest containing a script could be processed by Picketlink versions shipped in Jboss Application Platform 7.2.x and 7.1.x. An attacker could use this to send a malicious script to achieve cross-site scripting and obtain unauthorized information or conduct further attacks.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 10/05/2023
The vulnerability identified as CVE-2019-3872 represents a critical cross-site scripting flaw within the Picketlink identity management framework that was distributed with Red Hat JBoss Application Platform versions 7.1.x and 7.2.x. This issue arises from insufficient input validation and sanitization of SAMLRequest parameters within the SAML authentication flow, creating a pathway for malicious actors to inject and execute arbitrary script code within the context of affected applications. The vulnerability specifically targets the processing of SAML assertions where user-supplied data is not adequately sanitized before being rendered in web responses, enabling attackers to leverage this weakness in the authentication mechanism to compromise system security.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious SAMLRequest containing embedded script payloads that are then processed by the vulnerable Picketlink component. When the application handles this request and subsequently renders the SAML data in web responses, the malicious script executes within the browser context of authenticated users, potentially leading to session hijacking, credential theft, or further exploitation of the application environment. This flaw operates at the intersection of web application security and identity management systems, where the SAML protocol's trust model is compromised by inadequate sanitization of assertion parameters. The vulnerability is classified under CWE-79 as Cross-Site Scripting and aligns with ATT&CK technique T1566.001 for Phishing via Social Media and T1071.004 for Application Layer Protocol: DNS, as attackers can leverage this weakness to establish persistent access through compromised user sessions.
The operational impact of CVE-2019-3872 extends beyond simple script execution, as it enables attackers to obtain unauthorized access to sensitive information and potentially escalate privileges within the application environment. An attacker could leverage this vulnerability to steal user session tokens, access restricted application functions, or redirect users to malicious sites that appear legitimate within the trusted application context. The vulnerability affects organizations using JBoss Application Platform versions that ship with vulnerable Picketlink implementations, making it particularly concerning for enterprise environments where single sign-on functionality is commonly deployed. The attack surface is broad as any application utilizing SAML authentication with affected Picketlink versions becomes vulnerable, potentially compromising the entire authentication ecosystem.
Organizations should implement immediate mitigations including upgrading to patched versions of JBoss Application Platform that contain updated Picketlink components with proper input validation and sanitization. The recommended approach involves applying the vendor security patches and ensuring that all SAMLRequest parameters undergo rigorous sanitization before processing and rendering. Additionally, implementing Content Security Policy headers and input validation at multiple layers can provide defense-in-depth measures against similar vulnerabilities. Security teams should conduct comprehensive vulnerability assessments to identify all instances of affected JBoss installations and implement proper monitoring for suspicious authentication requests. Network segmentation and access controls around authentication services can further limit the potential impact of exploitation attempts, while regular security testing of identity management components should be integrated into the organization's security posture to prevent similar vulnerabilities from emerging in the future.