CVE-2020-10758 Allocation of Resources Without Limits or Throttling in Keycloak

What is CVE-2020-10758?

CVE-2020-10758 is a high-severity denial of service vulnerability in Redhat Keycloak, published on 16 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-770

Which versions are affected by CVE-2020-10758?

2 open source packages ship an affected version, including org.keycloak:keycloak-parent. It affects 3 products.

Products include Redhat Keycloak, Redhat Openshift Application Runtimes, Redhat Single Sign-On.

How do I fix CVE-2020-10758?

Upgrade org.keycloak:keycloak-parent to 11.0.1 or later.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-10758 being exploited?

There is no known exploitation of CVE-2020-10758 in the wild and no public exploit code.

Other vulnerabilities in Redhat Keycloak

• CVE-2022-4361 Keycloak vulnerable to cross-site scripting when validating URI-schemes on SAML and OIDC Critical 10.0
• CVE-2022-1245 Keycloak vulnerable to privilege escalation on Token Exchange feature Critical 9.8
• CVE-2021-20195 keycloak Self Stored Cross-site Scripting vulnerability Critical 9.6
• CVE-2019-14910 Keycloak Authentication Error Critical 9.3
• CVE-2019-14909 Keycloak Authentication Error Critical 9.3

All Redhat Keycloak vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-52rg-hpwq-qp56.