CVE-2021-27025 Silent Configuration Failure in Puppet Agent
Puppet Agent may suffer a Denial of Service condition or ignore Augeas settings before the first pluginsync, affecting configuration management reliability.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-27025?
CVE-2021-27025 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 18 Nov 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw was discovered in Puppet Agent where the agent may silently ignore Augeas settings or may be vulnerable to a Denial of Service condition prior to the first 'pluginsync'.
Which versions are affected by CVE-2021-27025?
4 open source packages ship an affected version, including puppet. It affects 4 products.
| Package | Affected | Fixed in |
|---|---|---|
puppet RubyGems | All versions | 6.25.1 |
puppet RubyGems | All versions | 6.25.1 |
puppet RubyGems | From 7.0.0 | 7.12.1 |
puppet RubyGems | From 7.0.0 | 7.12.1 |
Linux distribution packages (6)
puppet Red Hat:openstack:16.1::el8 | All versions | 0:5.5.10-14.el8ost |
puppet-headless Red Hat:openstack:16.1::el8 | All versions | 0:5.5.10-14.el8ost |
puppet-server Red Hat:openstack:16.1::el8 | All versions | 0:5.5.10-14.el8ost |
puppet Red Hat:openstack:16.2::el8 | All versions | 0:5.5.10-14.el8ost |
puppet-headless Red Hat:openstack:16.2::el8 | All versions | 0:5.5.10-14.el8ost |
puppet-server Red Hat:openstack:16.2::el8 | All versions | 0:5.5.10-14.el8ost |
Products include Fedoraproject Fedora, Puppet Puppet, Puppet Puppet Agent, Puppet Puppet Enterprise.
How do I fix CVE-2021-27025?
Upgrade puppet to a fixed version for your release line: 6.25.1 or 7.12.1.
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-2021-27025 being exploited?
There is no known exploitation of CVE-2021-27025 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as DEBIAN-CVE-2021-27025, GHSA-q4g7-jrxv-67r9, RHSA-2022:8846, RHSA-2022:8862, UBUNTU-CVE-2021-27025.