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CVE-2021-44878

Common vulnerabilities & exposures (CVE)

CVE databaseCVE database blogpostRelease & EoL database
 
Published at: - 06-01-2022 02:15
Last modified: - 13-05-2022 05:51
Total changes: - 5

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Low
Attack complexity
Network
Attack vector
None
Availability
None
Confidentiality
High
Integrity
None
Privileges required
Unchanged
Scope
None
User interaction
7.5
Base score
3.9
3.6
Exploitability score
Impact score
 

Verification logic

OR
vendor=pac4j AND product=pac4j AND versionEndExcluding=4.5.5
vendor=pac4j AND product=pac4j AND versionStartIncluding=5.0.0 AND versionEndExcluding=5.3.1
 

Reference

 


Keywords

NVD

 

CVE-2021-44878

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures

 

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