CVE-2020-12689 OpenStack Keystone EC2 and/or credential endpoints are not protected from a scoped context

What is CVE-2020-12689?

CVE-2020-12689 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 6 May 2020. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0. Any user authenticated within a limited scope (trust/oauth/application credential) can create an EC2 credential with an escalated permission, such as obtaining admin while the user is on a limited viewer role. This potentially allows a malicious user to act as the admin on a project another user has the admin role on, which can effectively grant that user global admin privileges.

Weakness: CWE-269

Which versions are affected by CVE-2020-12689?

5 open source packages ship an affected version, including keystone. It affects 2 products.

Products include Canonical Ubuntu Linux, Openstack Keystone.

How do I fix CVE-2020-12689?

Upgrade keystone to a fixed version for your release line: 15.0.1 or 16.0.1.

Is CVE-2020-12689 being exploited?

There is no known exploitation of CVE-2020-12689 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2020-12689, GHSA-chgw-36xv-47cw, PYSEC-2020-53, UBUNTU-CVE-2020-12689.