CVE-2018-16877 Auth bypass in pacemaker

What is CVE-2018-16877?

CVE-2018-16877 is a high-severity authentication bypass vulnerability in Canonical Ubuntu Linux, published on 18 Apr 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A flaw was found in the way pacemaker's client-server authentication was implemented in versions up to and including 2.0.0. A local attacker could use this flaw, and combine it with other IPC weaknesses, to achieve local privilege escalation.

Weakness: CWE-287

Which versions are affected by CVE-2018-16877?

It affects 9 products.

Products include Canonical Ubuntu Linux, Clusterlabs Pacemaker, Debian Debian Linux, Fedoraproject Fedora, Opensuse Leap, Redhat Enterprise Linux and 3 more.

How do I fix CVE-2018-16877?

Apply the vendor's patch.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2018-16877 being exploited?

There is no known exploitation of CVE-2018-16877 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-2018-16877, GHSA-5jf9-5f49-xqr5, UBUNTU-CVE-2018-16877.