CVE-2015-2709 in Firefox
Summary
by MITRE
Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 38.0 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.
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Analysis
by VulDB Data Team • 05/17/2022
The vulnerability identified as CVE-2015-2709 represents a critical security flaw within the browser engine of Mozilla Firefox versions prior to 38.0, demonstrating the inherent risks associated with complex software components that handle untrusted data. This issue falls under the category of unspecified vulnerabilities, indicating that the exact technical details of the flaw were not fully disclosed in the initial description but were sufficient to enable remote exploitation. The vulnerability exists within the core rendering engine that processes web content, making it particularly dangerous as it could be triggered through normal web browsing activities without user interaction beyond visiting malicious websites.
The technical nature of this vulnerability manifests as memory corruption issues that can lead to application crashes or potentially more severe consequences including arbitrary code execution. Memory corruption vulnerabilities typically arise from improper handling of memory allocation, deallocation, or access patterns within software code. In the context of web browsers, such flaws often occur when processing malformed or malicious input from web pages, including HTML, JavaScript, or multimedia content. The unspecified nature of the vectors suggests that multiple attack paths could potentially exploit the same underlying memory management issues, making the vulnerability particularly concerning for security professionals who must defend against various potential attack surfaces.
From an operational impact perspective, this vulnerability creates significant risks for organizations and individual users who rely on Firefox as their primary web browser. The potential for remote code execution means that attackers could gain complete control over affected systems, potentially leading to data breaches, system compromise, or use as a foothold for further attacks within network environments. The denial of service aspect alone could disrupt business operations if users encounter frequent crashes or if attackers deliberately target specific organizations to prevent access to critical web resources. According to the common weakness enumeration framework, this vulnerability would likely map to CWE-119, which covers "Improper Access to Memory" and encompasses various memory corruption issues that can lead to arbitrary code execution.
The exploitation of CVE-2015-2709 aligns with tactics described in the attack framework, particularly those involving initial access through web-based attacks and privilege escalation through code execution. Attackers could leverage this vulnerability by crafting malicious web pages that trigger the memory corruption when processed by the affected Firefox versions, potentially using techniques such as buffer overflows, use-after-free conditions, or other memory management flaws. The fact that this vulnerability affects the browser engine means that users could be compromised simply by visiting malicious websites, making it an ideal target for drive-by download attacks or watering hole campaigns. Organizations should consider implementing network-based mitigations such as web application firewalls or content filtering solutions that can detect and block known malicious patterns, though the most effective protection remains timely patch deployment.
Security teams must prioritize the remediation of this vulnerability through immediate patching of all affected Firefox installations, as the window of opportunity for exploitation remains open for systems running vulnerable versions. The patching process should be carefully coordinated to ensure that all users, including those in enterprise environments with managed deployments, receive updates promptly. Additionally, organizations should conduct vulnerability assessments to identify any systems that may have been compromised through exploitation of this vulnerability prior to patching. The remediation process should include monitoring network traffic for signs of exploitation attempts and reviewing system logs for evidence of unauthorized access or abnormal behavior patterns that might indicate successful exploitation of the memory corruption flaw.