CVE-2011-1807 in Chrome
Summary
by MITRE
Google Chrome before 11.0.696.71 does not properly handle blobs, which allows remote attackers to execute arbitrary code via unspecified vectors that trigger an out-of-bounds write.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 11/07/2021
The vulnerability identified as CVE-2011-1807 represents a critical memory corruption flaw in Google Chrome browser versions prior to 11.0.696.71. This issue stems from improper handling of blob objects within the browser's JavaScript engine, specifically affecting the V8 JavaScript engine that powers Chrome's rendering capabilities. The flaw manifests when the browser processes certain blob data structures, leading to an out-of-bounds write condition that can be exploited by remote attackers to execute arbitrary code on affected systems.
The technical implementation of this vulnerability involves the browser's failure to properly validate blob object boundaries during memory allocation and manipulation processes. When Chrome encounters specific blob data patterns, particularly those involving large or malformed blob objects, the memory management system does not adequately check array bounds before performing write operations. This creates a scenario where malicious code can overwrite adjacent memory locations, potentially corrupting critical browser components or injecting malicious instructions into the execution flow. The vulnerability falls under the CWE-121 category of stack-based buffer overflow, though it operates at a more complex memory management level within the browser's engine.
From an operational perspective, this vulnerability presents a severe risk to users of older Chrome versions as it enables remote code execution without requiring any user interaction beyond visiting a malicious website. Attackers can craft web pages that contain specially crafted blob objects designed to trigger the out-of-bounds write condition when the browser attempts to process them. The exploit can lead to complete system compromise, allowing attackers to execute arbitrary commands with the privileges of the browser process, potentially escalating to full system control. This type of vulnerability is particularly dangerous in enterprise environments where users may be running outdated browser versions due to compatibility concerns or delayed patch management.
The attack vector for this vulnerability aligns with the ATT&CK framework's technique T1203, which covers exploitation for execution through browser-based attacks. The vulnerability can be delivered through various means including malicious websites, email attachments that render in browser contexts, or compromised web applications that serve content to Chrome users. Organizations should implement immediate patching strategies to address this vulnerability, as the window for exploitation remains significant given the widespread use of older Chrome versions in enterprise environments. Additionally, network-based security controls such as web application firewalls and content filtering systems can provide temporary mitigation while full patch deployment occurs. The vulnerability underscores the importance of maintaining current browser versions and implementing robust patch management policies to protect against known exploits that target memory corruption vulnerabilities in widely used software applications.