CVE-2011-3055 in Chrome
Summary
by MITRE
The browser native UI in Google Chrome before 17.0.963.83 does not require user confirmation before an unpacked extension installation, which allows user-assisted remote attackers to have an unspecified impact via a crafted extension.
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Analysis
by VulDB Data Team • 03/22/2021
The vulnerability identified as CVE-2011-3055 represents a critical security flaw in Google Chrome's extension installation mechanism that existed prior to version 17.0.963.83. This weakness resides in the browser's native user interface implementation where the system fails to enforce mandatory user confirmation steps during the installation of unpacked extensions. The absence of this crucial verification step creates an exploitable condition that enables malicious actors to potentially compromise user systems through crafted extension packages. The vulnerability specifically targets the extension management subsystem of the browser, which is a fundamental component responsible for handling third-party add-ons and modifications to the browser environment.
The technical nature of this flaw can be categorized under CWE-668, which addresses "Exposure of Resource to Wrong Sphere," specifically within the context of browser extension management. The vulnerability manifests when Chrome processes unpacked extensions without requiring explicit user interaction to confirm the installation, creating a path for unauthorized extension deployment. This behavior violates fundamental security principles of user consent and system integrity protection. Attackers can exploit this by crafting malicious extensions that, when installed, could execute arbitrary code, steal user data, or establish persistent access to the compromised system. The lack of user confirmation creates an automated installation path that bypasses normal security controls designed to prevent unauthorized modifications to the browser environment.
The operational impact of CVE-2011-3055 extends beyond simple privilege escalation, as it enables a range of malicious activities through the browser extension attack surface. Remote attackers with access to the target system can leverage this vulnerability to deploy malware, keyloggers, or other malicious software that operates within the browser context. The unspecified impact mentioned in the CVE description suggests that the consequences could include data exfiltration, credential theft, or establishment of backdoors. This vulnerability is particularly dangerous in enterprise environments where browser extensions are commonly used and where the attack surface is expanded due to the increased number of potential entry points. The user-assisted nature of the attack means that while the attacker needs some form of user interaction to initiate the process, the lack of confirmation requirements significantly lowers the barrier to successful exploitation.
Mitigation strategies for CVE-2011-3055 primarily involve updating to Google Chrome version 17.0.963.83 or later, which implements the necessary user confirmation requirements for extension installations. Organizations should establish strict policies regarding browser extension management, including regular updates and monitoring of installed extensions. Security controls should be implemented to restrict the installation of unpacked extensions, particularly in environments where security is paramount. The vulnerability's remediation aligns with ATT&CK technique T1176, which addresses "Browser Extensions") and emphasizes the importance of controlling browser modification capabilities. Additionally, security professionals should implement network monitoring to detect unusual extension installation patterns and maintain comprehensive audit logs of browser extension activities. Regular security assessments should include verification of browser extension security configurations to prevent exploitation of similar vulnerabilities in other browser components or versions.