CVE-2022-28873 in Safe Browser
Summary
by MITRE • 05/12/2022
A vulnerability affecting F-Secure SAFE browser was discovered. An attacker can potentially exploit Javascript window.open functionality in SAFE Browser which could lead address bar spoofing attacks.
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Analysis
by VulDB Data Team • 05/14/2022
The vulnerability identified as CVE-2022-28873 represents a critical security flaw within the F-Secure SAFE browser implementation that undermines user trust and browser security assurances. This issue specifically targets the browser's handling of JavaScript window.open functionality, creating a pathway for malicious actors to manipulate the user interface in ways that compromise security awareness. The flaw exists within the browser's security model where legitimate JavaScript operations can be exploited to create deceptive user experiences that mislead users about the actual origin of web content they are interacting with.
The technical root cause of this vulnerability stems from inadequate validation and sanitization of window.open parameters within the F-Secure SAFE browser environment. When JavaScript code executes window.open commands, the browser fails to properly verify the legitimacy of the target URL or the context in which the new window is being opened. This weakness allows attackers to craft malicious JavaScript payloads that can open new browser windows with deceptive URLs or manipulated address bar content. The vulnerability manifests when the browser does not sufficiently enforce security boundaries between different browsing contexts, enabling attackers to exploit this gap in the security architecture to create convincing spoofing scenarios.
From an operational impact perspective, this vulnerability creates significant risks for users who rely on F-Secure SAFE browser for their daily online activities. Address bar spoofing attacks can lead to various malicious outcomes including phishing attempts, credential theft, and social engineering campaigns that exploit user trust in the browser interface. The vulnerability essentially undermines the fundamental security principle of user interface integrity, where users expect the address bar to accurately represent the domain they are visiting. Attackers can leverage this flaw to present fake banking interfaces, social media login pages, or other deceptive websites that appear legitimate to unsuspecting users, potentially leading to financial loss, identity theft, or corporate data breaches.
The security implications of CVE-2022-28873 align with common attack patterns documented in the MITRE ATT&CK framework under the technique of "Browser Session Hijacking" and "Phishing with Spoofed UI" categories. This vulnerability can be classified under CWE-79 as a Cross-Site Scripting (XSS) weakness, specifically related to improper neutralization of input during web page generation. The flaw enables attackers to manipulate the browser's user interface in ways that bypass standard security measures, making it particularly dangerous for enterprise environments where users may be accessing sensitive corporate data through the affected browser. Organizations relying on F-Secure SAFE browser for security protection face increased risk of targeted attacks that exploit this specific implementation gap in the browser's security architecture.
Effective mitigation strategies for this vulnerability require immediate action from system administrators and security teams. The primary recommendation involves applying the latest security patches provided by F-Secure as soon as they become available, which should address the underlying JavaScript window.open validation issues. Additionally, organizations should implement network-level controls and web filtering solutions that can detect and block suspicious JavaScript behavior patterns. Browser hardening measures including disabling unnecessary JavaScript features, implementing strict Content Security Policies, and configuring security headers can provide additional protection layers. Users should be educated about the signs of address bar spoofing attacks and encouraged to verify website authenticity through multiple means beyond relying solely on the browser interface. Regular security assessments and penetration testing should be conducted to identify similar implementation weaknesses in other browser components or security solutions that may present similar attack vectors.