CVE-2012-4543 in Certificate System
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in Red Hat Certificate System (RHCS) before 8.1.3 allow remote attackers to inject arbitrary web script or HTML via the (1) pageStart or (2) pageSize to the displayCRL script, or (3) nonce variable to the profileProcess script.
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Analysis
by VulDB Data Team • 12/29/2024
The CVE-2012-4543 vulnerability represents a critical cross-site scripting flaw in Red Hat Certificate System version 8.1.2 and earlier, exposing organizations to significant web application security risks. This vulnerability affects the certificate management infrastructure that many enterprises rely upon for secure digital certificate operations, making it particularly dangerous in environments where certificate authorities are critical components of security infrastructure. The vulnerability stems from inadequate input validation and sanitization within the RHCS web interfaces, specifically in the displayCRL and profileProcess scripts that handle user-supplied parameters.
The technical implementation of this vulnerability occurs through three distinct attack vectors that all involve improper handling of user-controllable input parameters. The first vector targets the pageStart parameter in the displayCRL script, while the second targets the pageSize parameter in the same script, and the third vector targets the nonce variable in the profileProcess script. These parameters are directly incorporated into the web response without proper sanitization or encoding, allowing attackers to inject malicious javascript code or html content. The vulnerability is classified as a classic reflected XSS attack pattern where malicious input is immediately reflected back to the user's browser, enabling attackers to execute arbitrary scripts in the context of the victim's session.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with the capability to steal session cookies, perform unauthorized certificate operations, and potentially escalate privileges within the certificate system. Attackers could leverage this vulnerability to impersonate legitimate users, access sensitive certificate information, or even manipulate certificate revocation lists that could compromise the entire certificate authority infrastructure. The reflected nature of the XSS means that attackers could craft malicious URLs that, when clicked by authenticated users, would execute the malicious code in their browsers. This creates a particularly dangerous scenario in enterprise environments where certificate administrators frequently interact with the system through web interfaces, potentially allowing attackers to gain unauthorized access to certificate management functions.
Organizations should implement immediate mitigations including upgrading to Red Hat Certificate System version 8.1.3 or later, which contains the necessary patches to address these XSS vulnerabilities. Input validation and output encoding should be implemented at all entry points where user-supplied data is processed and displayed, following the principle of least privilege in web application design. The vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in web applications, and represents a clear violation of secure coding practices that should be addressed through comprehensive security testing and code review processes. Additionally, implementing content security policies and using proper parameterized queries can provide additional defense-in-depth measures against similar vulnerabilities in the future. The ATT&CK framework categorizes this as a web application vulnerability that enables initial access and privilege escalation through user interaction, making it particularly concerning for enterprise security postures that rely on certificate infrastructure for authentication and encryption services.