CVE-2020-9753 in Whale Browser
Summary
by MITRE
Whale Browser Installer before 1.2.0.5 versions don't support signature verification for Flash installer.
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Analysis
by VulDB Data Team • 10/18/2020
The Whale Browser Installer vulnerability CVE-2020-9753 represents a critical security flaw in the software supply chain that affects versions prior to 1.2.0.5. This issue specifically targets the Flash installer component which is commonly used for delivering multimedia content and web applications. The vulnerability stems from the absence of digital signature verification mechanisms within the installer process, creating a significant attack surface that adversaries can exploit to compromise systems. The flaw exists at the installation phase rather than during runtime execution, making it particularly dangerous as it can persistently compromise systems before they are even fully operational.
This vulnerability maps directly to CWE-311, which addresses the absence of cryptographic protection of sensitive data, and CWE-312, which deals with the exposure of sensitive information through cleartext storage or transmission. The lack of signature verification creates a path for attackers to inject malicious code into the Flash installer, effectively bypassing the security controls that would normally validate the authenticity and integrity of downloaded components. The installer's failure to verify digital signatures means that any executable code delivered through this mechanism can be modified or replaced by malicious actors without detection. This weakness fundamentally undermines the principle of secure software delivery and establishes a persistent backdoor that can be leveraged for further compromise.
The operational impact of this vulnerability extends beyond simple code injection attacks and can enable sophisticated attack chains that align with multiple techniques documented in the MITRE ATT&CK framework. Attackers can leverage this weakness to execute initial access through malicious installer modifications, potentially leading to privilege escalation and lateral movement within networks. The vulnerability creates opportunities for supply chain attacks where legitimate software distributors become compromised, allowing attackers to deliver malicious payloads under the guise of trusted software. Systems that rely on Whale Browser's Flash installer for content delivery become vulnerable to man-in-the-middle attacks, where attackers can intercept and modify installation packages without detection. The persistence of this vulnerability across multiple versions indicates a systemic failure in the software development lifecycle that affects the overall security posture of organizations relying on this installer.
Organizations should immediately implement mitigations including updating to Whale Browser Installer version 1.2.0.5 or later, which includes proper signature verification mechanisms. Network administrators should monitor for suspicious installation activities and implement additional verification controls such as hash validation of downloaded packages before execution. The recommended approach involves establishing secure software distribution channels with proper cryptographic verification procedures and implementing network segmentation to limit the potential impact of successful exploitation attempts. Security teams should also consider deploying endpoint detection and response solutions that can identify anomalous installation patterns and verify the integrity of system components against known good baselines. Regular security assessments should be conducted to ensure that all software components maintain proper signature verification capabilities and that the supply chain integrity is preserved throughout the software lifecycle.