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.

Risk Information

Base Score

7.5

MODERATE

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Score

Exploitation Probability

0.139

Associated Vulnerability

Vulnerability	OS Platform
Vulnerabilities CVE-2021-44878 are fixed in Pac4J--oidc 4.5.5	Windows
Vulnerabilities CVE-2021-44878 are fixed in Pac4J--oidc 5.3.1	Windows
Vulnerabilities CVE-2021-44878 are fixed in Pac4J--oidc for Linux 4.5.5	Linux
Vulnerabilities CVE-2021-44878 are fixed in Pac4J--oidc for Linux 5.3.1	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234