CVE-2021-44878
maven/org.pac4j/pac4j-saml
Improper Verification of Cryptographic Signature
Pac4j v5.1 allows (by default) clients to accept and successfully validate ID Tokens with none
algorithm (i.e., tokens with no signature) which is not secure and violates the OpenID Core Specification. The none
algorithm does not require any signature verification when validating the ID tokens, which allows the attacker to bypass the token validation by injecting a malformed ID token using none
as the value of alg
key in the header with an empty signature value.
All versions before 4.5.5, all versions starting from 5.0.0 before 5.3.1
Upgrade to versions 4.5.5, 5.3.1 or above.
2022-01-16
source |