telnet.rb in Puppet 2.7.x before 2.7.13 and Puppet Enterprise (PE) 1.2.x, 2.0.x, and 2.5.x before 2.5.1 allows local users to overwrite arbitrary files via a symlink attack on the NET::Telnet connection log (/tmp/out.log).

References

• https://nvd.nist.gov/vuln/detail/CVE-2012-1989
• https://exchange.xforce.ibmcloud.com/vulnerabilities/74797
• https://hermes.opensuse.org/messages/15087408
• http://lists.opensuse.org/opensuse-updates/2012-05/msg00012.html
• http://projects.puppetlabs.com/issues/13606
• http://projects.puppetlabs.com/projects/1/wiki/Release_Notes#2.7.13
• http://puppetlabs.com/security/cve/cve-2012-1989/
• http://ubuntu.com/usn/usn-1419-1
• https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puppet/CVE-2012-1989.yml
• https://web.archive.org/web/20120415105345/http://www.securityfocus.com/bid/52975
• https://www.puppet.com/security/cve/cve-2012-1989-arbitrary-file-write-access