Vulnerability Details : CVE-2021-20278
An authentication bypass vulnerability was found in Kiali in versions before 1.31.0 when the authentication strategy `OpenID` is used. When RBAC is enabled, Kiali assumes that some of the token validation is handled by the underlying cluster. When OpenID `implicit flow` is used with RBAC turned off, this token validation doesn't occur, and this allows a malicious user to bypass the authentication.
Vulnerability category: BypassGain privilege
Products affected by CVE-2021-20278
- cpe:2.3:a:kiali:kiali:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-20278
0.16%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 34 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-20278
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:N |
8.6
|
4.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
3.9
|
2.5
|
NIST |
CWE ids for CVE-2021-20278
-
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.Assigned by: nvd@nist.gov (Primary)
-
This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.Assigned by: secalert@redhat.com (Secondary)
References for CVE-2021-20278
-
https://bugzilla.redhat.com/show_bug.cgi?id=1937171
1937171 – (CVE-2021-20278) CVE-2021-20278 kiali: authentication bypass when using the OpenID login strategyIssue Tracking;Patch;Third Party Advisory
-
https://kiali.io/news/security-bulletins/kiali-security-002/
Kiali: Service mesh observability and configurationVendor Advisory
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