Description
Rack::Session is a session management implementation for Rack. From 2.0.0 to before 2.1.2, Rack::Session::Cookie incorrectly handles decryption failures when configured with secrets:. If cookie decryption fails, the implementation falls back to a default decoder instead of rejecting the cookie. This allows an unauthenticated attacker to supply a crafted session cookie that is accepted as valid session data without knowledge of any configured secret. Because this mechanism is used to load session state, an attacker can manipulate session contents and potentially gain unauthorized access. This vulnerability is fixed in 2.1.2.
Problem types
CWE-287: Improper Authentication
CWE-345: Insufficient Verification of Data Authenticity
CWE-502: Deserialization of Untrusted Data
CWE-565: Reliance on Cookies without Validation and Integrity Checking
Product status
References
github.com/...ession/security/advisories/GHSA-33qg-7wpp-89cq