CVE-2020-15085 in Storefront
Summary
by MITRE
In Saleor Storefront before version 2.10.3, request data used to authenticate customers was inadvertently cached in the browser's local storage mechanism, including credentials. A malicious user with direct access to the browser could extract the email and password. In versions prior to 2.10.0 persisted the cache even after the user logged out. This is fixed in version 2.10.3. A workaround is to manually clear application data (browser's local storage) after logging into Saleor Storefront.
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Analysis
by VulDB Data Team • 10/28/2020
The vulnerability identified as CVE-2020-15085 represents a critical security flaw in the Saleor Storefront platform affecting versions prior to 2.10.3. This issue stems from improper handling of customer authentication data within the browser's client-side storage mechanisms, creating a persistent security risk that directly violates fundamental principles of credential management and session security. The flaw allows sensitive authentication information to be stored in local storage, which persists beyond normal session boundaries and even after user logout, creating an exploitable condition that compromises user account security.
The technical implementation of this vulnerability manifests through the application's failure to properly sanitize and secure authentication data within the browser environment. When customers authenticate with the storefront, the system inadvertently stores not only session tokens but also the actual email and password credentials in the browser's local storage mechanism. This design flaw directly contravenes security best practices outlined in the OWASP Top Ten and CWE-522, which specifically addresses insufficiently protected credentials. The local storage persistence means that even after users explicitly log out of the application, the cached credentials remain accessible to any malicious actor with direct access to the browser environment.
The operational impact of this vulnerability extends beyond simple credential exposure, creating a significant attack surface that enables various malicious activities. An attacker with physical access to a victim's browser or the ability to execute malicious code within the same browsing context can directly extract stored credentials and use them to impersonate users or gain unauthorized access to their accounts. This vulnerability particularly affects the authentication and session management components of the application, creating a persistent threat vector that remains active until the browser's local storage is manually cleared. The vulnerability's persistence across logout events specifically aligns with ATT&CK technique T1531, which covers credential access through unauthorized access to stored credentials, and represents a failure in the application's session lifecycle management.
The security implications of this vulnerability are compounded by the fact that it affects multiple versions of the storefront platform, with the issue persisting even after logout operations in versions prior to 2.10.0. This demonstrates a fundamental flaw in the application's security architecture that fails to properly implement secure credential handling practices. The recommended fix in version 2.10.3 addresses the core issue by ensuring that authentication data is properly cleared from local storage upon user logout, while the workaround of manually clearing application data provides an interim solution for users operating on vulnerable versions. This vulnerability highlights the critical importance of proper credential handling in web applications and the necessity of implementing robust session management that adheres to security standards such as those defined in NIST SP 800-63B and the ISO/IEC 27001 framework for information security management.