CVE-2010-2754 in SeaMonkey
Summary
by MITRE
dom/base/nsJSEnvironment.cpp in Mozilla Firefox 3.5.x before 3.5.11 and 3.6.x before 3.6.7, Thunderbird 3.0.x before 3.0.6 and 3.1.x before 3.1.1, and SeaMonkey before 2.0.6 does not properly suppress a script s URL in certain circumstances involving a redirect and an error message, which allows remote attackers to obtain sensitive information about script parameters via a crafted HTML document, related to the window.onerror handler.
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Analysis
by VulDB Data Team • 09/21/2021
The vulnerability described in CVE-2010-2754 represents a sensitive information disclosure issue affecting multiple Mozilla-based applications including Firefox, Thunderbird, and SeaMonkey. This flaw exists within the dom/base/nsJSEnvironment.cpp file and specifically impacts versions prior to the mentioned security patches. The vulnerability manifests when a web page contains a script that triggers a redirect followed by an error condition, creating an opportunity for attackers to extract sensitive information from script parameters through crafted HTML documents.
The technical mechanism behind this vulnerability involves the improper handling of script URLs within the window.onerror event handler. When a script encounters an error during execution, particularly in scenarios involving redirects, the browser's error reporting mechanism fails to adequately sanitize the URL information that gets exposed in error messages. This occurs because the security context that should normally suppress or mask script parameters during error reporting is bypassed under specific redirect conditions. The flaw essentially allows attackers to craft malicious HTML documents that, when processed by vulnerable browsers, reveal information about script parameters that would normally be protected from external access.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can provide attackers with valuable reconnaissance data that may aid in subsequent attacks. The exposure of script parameters can include sensitive information such as API keys, session identifiers, or other confidential data that might be embedded in script URLs. This information leakage could enable attackers to construct more sophisticated attacks against the targeted applications or users. The vulnerability is particularly concerning because it affects multiple browser products from the same vendor, indicating a systemic issue in how error handling is implemented across the codebase.
Security professionals should note that this vulnerability aligns with CWE-200, which describes improper exposure of sensitive information, and can be categorized under ATT&CK technique T1059.007 for scripting languages. The flaw demonstrates how seemingly minor error handling inconsistencies can create significant security risks. Organizations should prioritize patching affected versions of Firefox, Thunderbird, and SeaMonkey to address this vulnerability. Additionally, administrators should implement network monitoring to detect potential exploitation attempts and consider browser hardening measures that limit script execution in untrusted contexts. The vulnerability underscores the importance of thorough security testing of error handling mechanisms and proper sanitization of user-facing information in web applications.