CVE-2022-28870 in Safe Browser
Summary
by MITRE • 04/15/2022
A vulnerability affecting F-Secure SAFE browser was discovered. A maliciously crafted website could make a phishing attack with address bar spoofing as the address bar was not correct if navigation fails.
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Analysis
by VulDB Data Team • 04/20/2022
The vulnerability identified as CVE-2022-28870 resides within the F-Secure SAFE browser implementation, representing a critical security flaw that undermines user trust and browser integrity. This issue manifests when a malicious website attempts to conduct phishing attacks through address bar spoofing techniques, exploiting a fundamental weakness in the browser's navigation handling mechanisms. The vulnerability specifically targets the browser's ability to maintain accurate address bar representation during navigation failures, creating a window of opportunity for attackers to deceive users into believing they are visiting legitimate websites while actually being redirected to malicious counterparts.
The technical exploitation of this vulnerability stems from insufficient validation and verification mechanisms within the browser's address bar rendering system. When navigation fails or encounters unexpected conditions, the browser fails to properly update or validate the displayed URL, allowing attackers to manipulate the visual representation of the current location. This flaw operates at the intersection of browser security architecture and user interface integrity, where the expectation of consistent and accurate address bar display becomes compromised. The vulnerability can be classified under CWE-200, which addresses information exposure, and more specifically aligns with CWE-352, concerning cross-site request forgery, though the primary vector here involves address bar manipulation rather than traditional CSRF attacks.
The operational impact of CVE-2022-28870 extends beyond simple phishing attempts, as it fundamentally compromises user confidence in the browser's security assurances. Attackers can leverage this vulnerability to create highly convincing fake websites that appear legitimate due to the incorrect address bar display, potentially leading to credential theft, financial fraud, and data exfiltration. The attack surface becomes particularly dangerous in environments where users may not immediately notice the discrepancy between the displayed address and the actual website destination. This vulnerability directly maps to ATT&CK technique T1531, which focuses on "Modify System Image" and can be extended to encompass techniques involving browser interface manipulation for social engineering purposes.
Mitigation strategies for this vulnerability require immediate attention from both F-Secure and end-users. The primary solution involves implementing robust address bar validation mechanisms that ensure consistent URL representation regardless of navigation success or failure states. Browser vendors should enforce strict validation protocols that prevent address bar spoofing during navigation events, utilizing techniques such as immediate URL verification and display synchronization. Users should be advised to remain vigilant about URL verification, particularly when performing sensitive transactions, and to verify website authenticity through multiple means beyond just address bar inspection. Additionally, implementing browser security features such as URL preview mechanisms, enhanced navigation warnings, and automatic address bar verification can significantly reduce the attack surface. The vulnerability also highlights the importance of regular security audits and penetration testing of browser components, particularly those related to user interface elements that directly impact user trust and security perception. Organizations using F-Secure SAFE should consider immediate deployment of security patches and updates, while also implementing network-level monitoring to detect potential exploitation attempts. The remediation process should include comprehensive testing of address bar behavior under various navigation failure scenarios to ensure the fix effectively prevents the spoofing conditions that enable this attack vector.