CVE-2012-3979 in Firefox
Summary
by MITRE
Mozilla Firefox before 15.0 on Android does not properly implement unspecified callers of the __android_log_print function, which allows remote attackers to execute arbitrary code via a crafted web page that calls the JavaScript dump function.
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Analysis
by VulDB Data Team • 01/02/2025
The vulnerability identified as CVE-2012-3979 represents a critical security flaw in Mozilla Firefox versions prior to 15.0 when running on Android platforms. This issue stems from improper implementation of the __android_log_print function calls within the mobile browser's architecture, creating a pathway for remote code execution through malicious web content. The flaw specifically affects the Android version of Firefox, highlighting the unique security considerations present in mobile browser implementations that differ significantly from desktop counterparts.
The technical root cause of this vulnerability lies in the improper handling of JavaScript function calls that interface with Android's native logging system. When the JavaScript dump function is invoked through a crafted web page, it triggers the __android_log_print function without adequate input validation or sanitization. This allows attackers to manipulate the function parameters in ways that can bypass normal security boundaries between the browser's JavaScript environment and the underlying Android operating system. The vulnerability essentially creates a bridge between the web application layer and the native Android system, enabling arbitrary code execution with the privileges of the Firefox process.
From an operational impact perspective, this vulnerability presents a severe threat to Android users of affected Firefox versions. Remote attackers can exploit this flaw by simply persuading victims to visit malicious websites, making it particularly dangerous in phishing campaigns and drive-by download scenarios. The attack vector requires no user interaction beyond visiting a compromised page, and the execution occurs within the context of the browser process, potentially allowing attackers to access sensitive user data, perform unauthorized operations, or escalate privileges to gain broader system access. This vulnerability directly impacts the principle of least privilege by allowing web content to execute native system functions.
The security implications extend beyond simple code execution to encompass potential data breaches and system compromise. Attackers leveraging this vulnerability could access user credentials, browsing history, and other sensitive information stored within the browser or system. The flaw also aligns with attack patterns described in the MITRE ATT&CK framework under the execution and privilege escalation domains, as it enables adversaries to run arbitrary code and potentially elevate their privileges within the Android environment. This vulnerability type falls under CWE-74 as it involves injection of code through improper handling of function calls that interface with native system components.
Mitigation strategies for this vulnerability primarily involve upgrading to Firefox version 15.0 or later, where the implementation of __android_log_print has been corrected to properly validate and sanitize input parameters. Organizations should also implement network-level protections such as web application firewalls that can detect and block suspicious JavaScript patterns, particularly those involving dump function calls. Browser security configurations should be reviewed to ensure that unnecessary native system access permissions are not granted to web content. Additionally, user education about avoiding untrusted websites and keeping software updated remains crucial in defending against this class of vulnerability that exploits the trust model between web browsers and operating system components.