High severityNVD Advisory· Published Jan 6, 2022· Updated Aug 4, 2024
CVE-2021-44878
CVE-2021-44878
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.pac4j:pac4j-oidcMaven | < 4.5.5 | 4.5.5 |
org.pac4j:pac4j-oidcMaven | >= 5.0, < 5.3.1 | 5.3.1 |
Affected products
2- pac4j/pac4jdescription
Patches
Vulnerability mechanics
References
8- github.com/advisories/GHSA-xhw6-hjc9-679mghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-44878ghsaADVISORY
- github.com/pac4j/pac4j/commit/09684e0de1c4753d22c53b8135d4ef61cfda76f7ghsaWEB
- github.com/pac4j/pac4j/commit/22b82ffd702a132d9f09da60362fc6264fc281aeghsax_refsource_MISCWEB
- github.com/pac4j/pac4j/commit/9c87bbc536ed5d05f940ae015403120df2935589ghsaWEB
- openid.net/specs/openid-connect-core-1_0.htmlghsax_refsource_MISCWEB
- www.pac4j.org/4.5.x/docs/release-notes.htmlghsaWEB
- www.pac4j.org/blog/cve_2021_44878_is_this_serious.htmlghsax_refsource_MISCWEB
News mentions
0No linked articles in our index yet.