Allocation of Resources Without Limits or Throttling in Keycloak - CVE-2020-10758
Published: September 16, 2020 / Updated: September 24, 2020
Vulnerability identifier: #VU47049
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-10758
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
A vulnerability was found in Keycloak before 11.0.1 where DoS attack is possible by sending twenty requests simultaneously to the specified keycloak server, all with a Content-Length header value that exceeds the actual byte count of the request body.
Affected software
Keycloak
Red Hat Single Sign-On
rh-sso7-keycloak (Red Hat package)
Red Hat Single Sign-On
rh-sso7-keycloak (Red Hat package)
How to mitigate CVE-2020-10758
Install update from vendor's website.
Keycloak - update to 11.0.1
Red Hat Single Sign-On - update to 7.4.2
rh-sso7-keycloak (Red Hat package) - addressed in versions 9.0.5-1.redhat_00001.1.el6sso, 9.0.5-1.redhat_00001.1.el7sso, 9.0.5-1.redhat_00001.1.el8sso
Red Hat Single Sign-On - update to 7.4.2
rh-sso7-keycloak (Red Hat package) - addressed in versions 9.0.5-1.redhat_00001.1.el6sso, 9.0.5-1.redhat_00001.1.el7sso, 9.0.5-1.redhat_00001.1.el8sso