CVE-2016-8629

keycloak: user deletion via incorrect permissions check

Severity Score

6.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Red Hat Keycloak before version 2.4.0 did not correctly check permissions when handling service account user deletion requests sent to the rest server. An attacker with service account authentication could use this flaw to bypass normal permissions and delete users in a separate realm.

Red Hat Keycloak, en versiones anteriores a la 2.4.0, no comprobaba correctamente los permisos al gestionar peticiones de eliminación de usuario de cuenta de servicio enviadas al servidor REST. Un atacante con autenticación de cuenta de servicio podría aprovechar este fallo para omitir permisos normales y eliminar usuarios en un realm separado.

It was found that keycloak did not correctly check permissions when handling service account user deletion requests sent to the rest server. An attacker with service account authentication could use this flaw to bypass normal permissions and delete users in a separate realm.

Red Hat Single Sign-On is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications. This release of Red Hat Single Sign-On 7.1 serves as a replacement for Red Hat Single Sign-On 7.0, and includes several bug fixes and enhancements. For further information regarding those, refer to the Release Notes linked to in the References section. Multiple security issues have been addressed.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

Partial

Availability

Partial

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-10-12 CVE Reserved
2017-04-05 CVE Published
2024-09-16 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-264: Permissions, Privileges, and Access Controls
CWE-284: Improper Access Control

CAPEC

References (7)

URL	Tag	Source
http://www.securityfocus.com/bid/97392	Third Party Advisory
http://www.securitytracker.com/id/1038180	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://rhn.redhat.com/errata/RHSA-2017-0876.html	2019-10-09
https://access.redhat.com/errata/RHSA-2017:0872	2019-10-09
https://access.redhat.com/errata/RHSA-2017:0873	2019-10-09
https://bugzilla.redhat.com/show_bug.cgi?id=1388988	2017-04-04
https://access.redhat.com/security/cve/CVE-2016-8629	2017-04-04

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Redhat Search vendor "Redhat"	Single Sign On Search vendor "Redhat" for product "Single Sign On"	7.1 Search vendor "Redhat" for product "Single Sign On" and version "7.1"	-	Affected	in	Redhat Search vendor "Redhat"	Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"	6.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "6.0"	-	Safe
Redhat Search vendor "Redhat"	Single Sign On Search vendor "Redhat" for product "Single Sign On"	7.1 Search vendor "Redhat" for product "Single Sign On" and version "7.1"	-	Affected	in	Redhat Search vendor "Redhat"	Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"	7.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "7.0"	-	Safe
Redhat Search vendor "Redhat"	Single Sign On Search vendor "Redhat" for product "Single Sign On"	7.2 Search vendor "Redhat" for product "Single Sign On" and version "7.2"	-	Affected	in	Redhat Search vendor "Redhat"	Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"	6.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "6.0"	-	Safe
Redhat Search vendor "Redhat"	Single Sign On Search vendor "Redhat" for product "Single Sign On"	7.2 Search vendor "Redhat" for product "Single Sign On" and version "7.2"	-	Affected	in	Redhat Search vendor "Redhat"	Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"	7.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "7.0"	-	Safe
Redhat Search vendor "Redhat"		Keycloak Search vendor "Redhat" for product "Keycloak"				< 2.4.0 Search vendor "Redhat" for product "Keycloak" and version " < 2.4.0"		-		Affected