Incomplete in the CWE catalog · 194 CVEs mapped
Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.
Observable Timing Discrepancy vulnerability in Drupal SAML SSO - Service Provider allows Brute Force. This issue affects SAML SSO - Service Provider versions: from 0.0.0 to 3.2.0.
An observable timing discrepancy vulnerability has been reported to affect QuRouter. If exploited, the vulnerability could allow remote attackers to obtain sensitive data. We have already fixed the vulnerability in the following version: QuRouter 2.7.2.113 and later
OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. From 3.0.0 until 4.0.0, OAuthLib's PKCE checks in oauthlib/oauth2/rfc6749/grant_types/authorization_code.py compare attacker-supplied code_verifier values with stored challenges using ordinary string equality in code_challenge_method_plain and code_challenge_method_s256. Because the comparison can return after a length difference or the first mismatching character, repeated token endpoint measurements can reveal common-prefix timing information that could potentially allow recovery of the code_verifier, unauthorized access-token acquisition, and account takeover. Practical exploitation requires an intercepted, single-use authorization code and enough measurements to overcome real-world network noise; the local timing benchmark does not establish practical remote account takeover, so the weakness remains a defense-in-depth concern. This issue is fixed in version 4.0.0.