CVE-2021-27018
The mechanism which performs certificate validation was discovered to have a flaw that resulted...
The mechanism which performs certificate validation was discovered to have a flaw that resulted in certificates signed by an internal certificate authority to not be properly validated. This issue only affects clients that are configured to utilize Tenable.sc as the vulnerability data source.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
The mechanism which performs certificate validation was discovered to have a flaw that resulted in certificates signed by an internal certificate authority to not be properly validated. This issue only affects clients that are configured to utilize Tenable.sc as the vulnerability data source.
- Record
CVE-2021-27018- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-295
- Updated
- 2026-11-02
CVE List No score
The mechanism which performs certificate validation was discovered to have a flaw that resulted in certificates signed by an internal certificate authority to not be properly validated. This issue only affects clients that are configured to utilize Tenable.sc as the vulnerability data source.
- Record
CVE-2021-27018- Updated
- 2026-11-02
EUVDEUVD-2021-13791 No score
The mechanism which performs certificate validation was discovered to have a flaw that resulted in certificates signed by an internal certificate authority to not be properly validated. This issue only affects clients that are configured to utilize Tenable.sc as the vulnerability data source.
- Record
EUVD-2021-13791- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-22qw-g2hg-q8w6 No score
The mechanism which performs certificate validation was discovered to have a flaw that resulted...
The mechanism which performs certificate validation was discovered to have a flaw that resulted in certificates signed by an internal certificate authority to not be properly validated. This issue only affects clients that are configured to utilize Tenable.sc as the vulnerability data source.
- Record
GHSA-22qw-g2hg-q8w6- Weakness
- CWE-295
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-27018
The mechanism which performs certificate validation was discovered to have a flaw that resulted in certificates signed by an internal certificate authority to not be properly validated. This issue only affects clients that are configured to utilize Tenable.sc as the vulnerability data source.
- Record
UBUNTU-CVE-2021-27018- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
puppetUbuntu:14.04:LTS |
All versions, plus listed versions 3.2.4-2ubuntu23.3.1-1ubuntu13.3.1-1ubuntu23.3.1-1ubuntu33.4.2-1 Show 5 moreShow less3.4.3-13.4.3-1ubuntu13.4.3-1ubuntu1.13.4.3-1ubuntu1.23.4.3-1ubuntu1.3 |
None known |
puppetUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 3.7.2-5ubuntu23.8.4-1ubuntu13.8.5-1ubuntu13.8.5-23.8.5-2ubuntu0.13.8.5-2ubuntu0.1+esm1 |
None known |
puppetUbuntu:18.04:LTS |
All versions, plus listed versions 4.10.4-2ubuntu14.10.4-2ubuntu24.10.4-2ubuntu35.4.0-2ubuntu3 |
None known |
puppetUbuntu:20.04:LTS |
All versions, plus listed versions 5.4.0-2ubuntu35.5.10-4ubuntu3 |
None known |
puppetUbuntu:22.04:LTS |
All versions, plus listed versions 5.5.22-1ubuntu15.5.22-45.5.22-4ubuntu0.2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-27018 is a high vulnerability (CVSS 7.5) in Puppet Remediate, published August 30, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.54%, the 45th percentile. No source names a fixed version.