CVE-2012-3867 Pupper does not properly restrict characters in Common Name field of Certificate Signing Request

What is CVE-2012-3867?

CVE-2012-3867 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 6 Aug 2012. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-264

Which versions are affected by CVE-2012-3867?

4 open source packages ship an affected version, including puppet. It affects 8 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Opensuse Opensuse, Puppet Puppet, Puppet Puppet Enterprise, Puppetlabs Puppet and 2 more.

How do I fix CVE-2012-3867?

Upgrade puppet to a fixed version for your release line: 2.6.17 or 2.7.18.

Is CVE-2012-3867 being exploited?

There is no known exploitation of CVE-2012-3867 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-2012-3867, GHSA-q44r-f2hm-v76v.