Summary
AWS IAM Identity Center exchanges third-party OIDC tokens for
Identity Center-issued tokens. Identity Center relies on the jti
claim in the third-party tokens to prevent replay attacks.
Identity Center maintained a cache of previously-seen jti values
for a fixed period (24 hours) and didn’t enforce that the third-party
tokens had expiry claims. This meant that a token with a jti claim and
without an exp claim could be replayed after >24 hours had passed.
Affected Services
Identity Center
Remediation
None required
Tracked CVEs
No tracked CVEs
References
Contributed by https://github.com/ramimac
Disclosure Date
Fri, Dec 1st, 2023
Exploitablity Period
-
Known ITW Exploitation
-
Detection Methods
-
Piercing Index Rating
-
Discovered by
Aidan Steele
