CVE-2012-2832 in Chrome
Summary
by MITRE
The image-codec implementation in the PDF functionality in Google Chrome before 20.0.1132.43 does not initialize an unspecified pointer, which allows remote attackers to cause a denial of service or possibly have unknown other impact via a crafted document.
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Analysis
by VulDB Data Team • 12/31/2024
The vulnerability identified as CVE-2012-2832 represents a critical memory safety issue within Google Chrome's PDF rendering capabilities. This flaw exists in the image-codec implementation that processes PDF documents, specifically affecting versions prior to 20.0.1132.43. The vulnerability stems from improper initialization of an unspecified pointer during PDF processing, creating a potential attack surface that remote adversaries can exploit to manipulate the browser's memory management. The issue falls under the broader category of memory corruption vulnerabilities that can lead to unpredictable system behavior and security compromise. The affected component operates within the browser's PDF viewer functionality, which is a common attack vector given the widespread use of PDF documents in web environments.
The technical exploitation of this vulnerability occurs when a malicious PDF document is loaded into Chrome's PDF viewer, triggering the uninitialized pointer scenario during image decoding operations. This memory management error can result in memory corruption that manifests as a denial of service condition, where the browser crashes or becomes unresponsive. However, the vulnerability's potential impact extends beyond simple service disruption, as the unspecified pointer initialization flaw could potentially enable more sophisticated attacks including arbitrary code execution. The nature of uninitialized memory pointers creates a scenario where attackers can manipulate memory contents to redirect execution flow or inject malicious code, making this a particularly dangerous vulnerability in the context of web browser security.
From an operational perspective, this vulnerability presents significant risk to organizations relying on Google Chrome for document viewing and web browsing activities. The remote attack vector means that simply visiting a compromised website or opening a malicious PDF attachment could trigger the exploit without user interaction beyond normal browsing behavior. The vulnerability's impact on browser stability can lead to productivity loss, system downtime, and potential data exposure during denial of service attacks. Security professionals must consider this vulnerability as part of broader browser security assessments, particularly in environments where PDF documents are frequently accessed. The vulnerability's classification aligns with CWE-457 which addresses use of uninitialized variables, and may map to ATT&CK technique T1059.007 for execution through web-based attacks.
Mitigation strategies for CVE-2012-2832 primarily focus on immediate remediation through browser updates to versions 20.0.1132.43 or later where the pointer initialization issue has been addressed. Organizations should implement comprehensive patch management procedures to ensure all Chrome installations are updated promptly. Additional protective measures include implementing PDF content filtering, restricting PDF document access through network security controls, and deploying browser security extensions that provide additional sandboxing. Security monitoring should include detection of suspicious PDF file access patterns and browser crash events that may indicate exploitation attempts. Network administrators should consider implementing web application firewalls and content filtering solutions that can identify and block malicious PDF documents before they reach end-user browsers. Regular security assessments of browser configurations and user access controls should be conducted to minimize the attack surface and ensure that all security updates are properly deployed across the organization's computing environment.