CVE-2021-44878

If an OpenID Connect provider supports the "none" algorithm (i.e., tokens with no signature), pac4j v5.3.0 (and prior) does not refuse it without an explicit configuration on its side or for the "idtoken" response type 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.
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:*
cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:*

History

21 Nov 2024, 06:31

Type Values Removed Values Added
References () https://github.com/pac4j/pac4j/commit/22b82ffd702a132d9f09da60362fc6264fc281ae - Patch, Third Party Advisory () https://github.com/pac4j/pac4j/commit/22b82ffd702a132d9f09da60362fc6264fc281ae - Patch, Third Party Advisory
References () https://openid.net/specs/openid-connect-core-1_0.html#IDToken - Product, Third Party Advisory () https://openid.net/specs/openid-connect-core-1_0.html#IDToken - Product, Third Party Advisory
References () https://www.pac4j.org/blog/cve_2021_44878_is_this_serious.html - Mitigation, Vendor Advisory () https://www.pac4j.org/blog/cve_2021_44878_is_this_serious.html - Mitigation, Vendor Advisory

Information

Published : 2022-01-06 13:15

Updated : 2024-11-21 06:31


NVD link : CVE-2021-44878

Mitre link : CVE-2021-44878

CVE.ORG link : CVE-2021-44878


JSON object : View

Products Affected

pac4j

  • pac4j
CWE
CWE-347

Improper Verification of Cryptographic Signature