CyberRota Analysis
AI-GeneratedThe ueberauth_apple library is vulnerable to an authentication bypass due to insufficient validation of ID token claims, allowing attackers to exploit unvalidated sub claims for account takeover. This vulnerability enables an attacker to replay stolen Apple-signed ID tokens, potentially leading to indefinite access if the token lacks an expiration check, and facilitates cross-application account takeovers among clients within the same Apple developer team. Developers using ueberauth_apple versions from 0.1.0 to before 0.6.2 should prioritize patching this vulnerability to safeguard user accounts.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
Note: these links are listed for security research and verification purposes only.
Original NVD Description
Authentication Bypass by Spoofing vulnerability in ueberauth ueberauth_apple allows account takeover via unvalidated ID token claims. The Ueberauth.Strategy.Apple.Token.payload/2 function verifies the JWT signature of the callback id_token against Apple's JWKS but does not validate any registered claims. The iss, aud, exp, and iat claims are read from the token and passed on to Ueberauth.Strategy.Apple.handle_callback!/1, which derives the logged-in user's uid and email directly from the unvalidated sub claim. An attacker who obtains any Apple-signed ID token bearing the victim's sub (via a captured expired token, or via an ID token issued to a sibling client in the same Apple developer team) can replay it against the vulnerable callback and be authenticated as the victim. The absent exp check makes stolen tokens usable indefinitely, and the absent aud check enables cross-application account takeover across clients that share an Apple developer team. This issue affects ueberauth_apple: from 0.1.0 before 0.6.2.