CVE-2012-2833 in Chrome
Summary
by MITRE
Buffer overflow in the JS API in the PDF functionality in Google Chrome before 20.0.1132.43 allows remote attackers to cause a denial of service or possibly have unspecified other impact via unknown vectors.
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Analysis
by VulDB Data Team • 12/31/2024
The vulnerability identified as CVE-2012-2833 represents a critical buffer overflow flaw within the JavaScript API implementation of Google Chrome's PDF rendering functionality. This issue affects Chrome versions prior to 20.0.1132.43 and demonstrates the inherent risks associated with complex web browser components that handle multimedia content. The vulnerability resides in the JavaScript API layer that interfaces with PDF processing capabilities, creating a potential attack surface that malicious actors can exploit to compromise system integrity.
The technical flaw manifests as a buffer overflow condition within the PDF functionality's JavaScript Application Programming Interface, where insufficient bounds checking allows attackers to write beyond allocated memory buffers. This particular vulnerability operates within the context of web browser security models and represents a classic example of how client-side rendering components can become attack vectors. The buffer overflow occurs when processing PDF documents through Chrome's embedded PDF viewer, specifically during JavaScript API calls that interact with PDF objects and their associated data structures.
From an operational impact perspective, this vulnerability enables remote attackers to trigger either denial of service conditions or potentially achieve more severe consequences including arbitrary code execution. The unspecified nature of the other potential impacts aligns with buffer overflow vulnerabilities that can lead to privilege escalation, information disclosure, or system compromise depending on the execution context and attack vector employed. The vulnerability's remote exploitability means that attackers can leverage this flaw through web-based attacks without requiring local system access, making it particularly dangerous in enterprise environments where users frequently interact with untrusted web content.
The attack surface for CVE-2012-2833 aligns with the common attack patterns documented in the MITRE ATT&CK framework under the technique of exploitation for privilege escalation and denial of service. This vulnerability specifically maps to CWE-121, which describes heap-based buffer overflow conditions, and demonstrates how improper input validation in browser components can lead to memory corruption. Security professionals should note that this vulnerability represents a typical example of how complex browser features with multiple integration points can introduce security weaknesses that affect the entire browser ecosystem.
Mitigation strategies for this vulnerability primarily involve immediate patch deployment to update Chrome to version 20.0.1132.43 or later, which contains the necessary fixes to prevent the buffer overflow condition. Organizations should also implement network-based security controls including web application firewalls and content filtering systems to reduce exposure to malicious PDF content. Browser hardening measures such as disabling unnecessary plugins, implementing strict content security policies, and maintaining up-to-date security patches across all browser installations provide additional defense layers. Security monitoring should focus on detecting anomalous PDF rendering behavior and potential exploitation attempts through web-based attack vectors.