How severe is CVE-2012-3867?

CVE-2012-3867 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2012-3867 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-3867?

CVE-2012-3867 primarily affects Puppet. In total, 47 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-3867?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2012-3867 published?

CVE-2012-3867 was published on 2012-08-06 and last updated on 2026-06-16.

CVE-2012-3867

CVE-2012-3867 is a medium-severity vulnerability in Puppet with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-264.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Puppet
Published: 2012-08-06
Last modified: 2026-06-16

Description

lib/puppet/ssl/certificate_authority.rb in Puppet before 2.6.17 and 2.7.x before 2.7.18, and Puppet Enterprise before 2.5.2, does not properly restrict the characters in the Common Name field of a Certificate Signing Request (CSR), which makes it easier for user-assisted remote attackers to trick administrators into signing a crafted agent certificate via ANSI control sequences.

Frequently asked questions

What is CVE-2012-3867?: lib/puppet/ssl/certificate_authority.rb in Puppet before 2.6.17 and 2.7.x before 2.7.18, and Puppet Enterprise before 2.5.2, does not properly restrict the characters in the Common Name field of a Certificate Signing Request (CSR), which makes it easier for user-assisted remote attackers to trick administrators into signing a crafted agent certificate via ANSI control sequences.
How severe is CVE-2012-3867?: CVE-2012-3867 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2012-3867 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-3867?: CVE-2012-3867 primarily affects Puppet. In total, 47 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-3867?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-3867 published?: CVE-2012-3867 was published on 2012-08-06 and last updated on 2026-06-16.

References

Affected products (47)

cpe:2.3:a:puppet:puppet:2.6.0:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.6.1:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.6.2:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.6.3:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.6.4:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.6.5:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.6.6:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.6.7:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.6.8:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.6.9:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.6.10:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.6.11:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.6.12:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.6.13:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.6.14:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.6.15:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.7.2:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.7.3:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.7.4:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.7.5:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.7.6:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.7.7:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.7.8:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.7.9:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.7.10:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.7.11:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.7.12:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.7.13:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.7.14:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.7.16:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet:2.7.17:*:*:*:*:*:*:*
cpe:2.3:a:puppetlabs:puppet:*:*:*:*:*:*:*:*
cpe:2.3:a:puppetlabs:puppet:2.7.0:*:*:*:*:*:*:*
cpe:2.3:a:puppetlabs:puppet:2.7.1:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:11.04:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:11.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
cpe:2.3:o:opensuse:opensuse:11.4:*:*:*:*:*:*:*

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