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TITLE:
Puppet "certdnsnames" Puppet Master Impersonation Vulnerability

SECUNIA ADVISORY ID:
SA46550

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/46550/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=46550

RELEASE DATE:
2011-10-29

DISCUSS ADVISORY:
http://secunia.com/advisories/46550/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/46550/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=46550

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
A vulnerability has been reported in Puppet, which can be exploited
by malicious users to conduct spoofing attacks.

The vulnerability is caused due to the application inserting the
puppet master's DNS alt names ("certdnsnames") into the X.509 Subject
Alternative Name field of the certificate issued to the puppet agent.
This can be exploited to impersonate the puppet master via
Man-in-the-Middle (MitM) attacks.

The vulnerability is reported in versions 0.24.0 through 2.7.5.

SOLUTION:
Update to a fixed version.

Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://puppetlabs.com/security/cve/cve-2011-3872/

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

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Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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