CVE-2012-2834 in Chrome
Summary
by MITRE
Integer overflow in Google Chrome before 20.0.1132.43 allows remote attackers to cause a denial of service or possibly have unspecified other impact via crafted data in the Matroska container format.
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Analysis
by VulDB Data Team • 12/31/2024
The vulnerability identified as CVE-2012-2834 represents a critical integer overflow flaw within Google Chrome's handling of Matroska container format data. This issue affects Chrome versions prior to 20.0.1132.43 and demonstrates how multimedia processing components can introduce significant security risks. The vulnerability stems from insufficient input validation when parsing Matroska files, which are commonly used for video and audio content delivery on the web. Attackers can exploit this weakness by crafting malicious Matroska files designed to trigger integer overflow conditions during memory allocation operations.
The technical exploitation of this vulnerability occurs through the manipulation of specific fields within Matroska container headers that control the size and structure of data segments. When Chrome processes these crafted elements, the integer overflow causes unexpected behavior in memory management systems, potentially leading to buffer overflows or memory corruption. This type of vulnerability falls under CWE-190, which specifically addresses integer overflow conditions, and represents a classic example of how improper input validation can lead to arbitrary code execution or system instability. The Matroska format's complex structure with multiple nested elements and variable-length fields creates numerous potential entry points for attackers to manipulate integer values beyond their intended ranges.
From an operational impact perspective, this vulnerability enables remote attackers to perform denial of service attacks against Chrome users by simply visiting malicious websites or downloading compromised media files. The potential for unspecified other impacts suggests that successful exploitation could lead to more severe consequences beyond simple service disruption. The attack vector is particularly dangerous because it leverages common multimedia content delivery mechanisms that users frequently encounter while browsing the web. The vulnerability's impact extends to enterprise environments where Chrome is widely deployed, potentially affecting numerous users simultaneously. This type of attack aligns with ATT&CK technique T1203, which covers exploitation for privilege escalation through application vulnerabilities.
Mitigation strategies for CVE-2012-2834 primarily focus on immediate software updates to the patched version of Chrome, which resolves the integer overflow conditions in the Matroska parser. Organizations should implement comprehensive patch management policies that prioritize browser updates, particularly for widely used applications like Chrome that handle multimedia content. Additional defensive measures include deploying web content filters that can detect and block suspicious Matroska content, implementing network-based intrusion detection systems that monitor for exploitation attempts, and establishing user education programs about the risks of visiting untrusted websites. Security teams should also consider implementing sandboxing mechanisms that isolate multimedia processing components to limit the potential impact of successful exploits. The vulnerability highlights the importance of maintaining up-to-date security patches and demonstrates how seemingly benign multimedia functionality can become a significant attack surface when not properly validated.