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CVE-2020-10734

CVE-2020-10734:
OIDC Logout redirect in keycloak

3.3

CVSS Score
3.1

Basic Information

CVE ID
CVE-2020-10734
GHSA ID
GHSA-rvjg-gxwx-j5gf
EPSS Score
0.03476%
CWE
CWE-601
Published
4/28/2022
Updated
1/30/2023
KEV Status
No
Technology
TechnologyJava

Technical Details

CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Package NameEcosystemVulnerable VersionsFirst Patched Version
org.keycloak:keycloak-oidc-client-adapter-pommaven< 18.0.018.0.0

Vulnerability Intelligence
Miggo AIMiggo AI

Miggo AIRoot Cause Analysis

The vulnerability stems from the OIDC logout endpoint lacking CSRF protection. Keycloak's LogoutEndpoint class handles the logout logic, and the absence of CSRF checks in the logout method allows attackers to exploit this by crafting malicious requests. The advisory explicitly references the OIDC protocol component (org.keycloak.protocol.oidc) and the CWE-601 context (though misclassified, the root issue is CSRF). The patched version 18.0.0 likely added CSRF validation() to this endpoint, confirming the function's role in the vulnerability.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

* *l*w w*s *oun* in k*y*lo*k. T** OI** lo*out *n*point *o*s not **v* *SR* prot**tion. T** *i***st t*r**t *rom t*is vuln*r**ility is to syst*m *v*il**ility.

Reasoning

T** vuln*r**ility st*ms *rom t** OI** lo*out *n*point l**kin* *SR* prot**tion. K*y*lo*k's `Lo*out*n*point` *l*ss **n*l*s t** lo*out lo*i*, *n* t** **s*n** o* *SR* ****ks in t** lo*out m*t*o* *llows *tt**k*rs to *xploit t*is *y *r**tin* m*li*ious r*qu