SB2011102702 - Path traversal in Puppet

Description

This security bulletin contains information about 1 vulnerability.

1) Path traversal (CVE-ID: CVE-2011-3848)

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in Puppet 2.6.x before 2.6.10 and 2.7.x before 2.7.4. A remote authenticated attacker can send a specially crafted HTTP request and remote attackers to write X.509 Certificate Signing Request (CSR) to arbitrary locations via (1) a double-encoded key parameter in the URI in 2.7.x, (2) the CN in the Subject of a CSR in 2.6 and 0.25.

Remediation

Install update from vendor's website.

References

• http://lists.opensuse.org/opensuse-updates/2011-10/msg00033.html
• http://secunia.com/advisories/46628
• http://www.debian.org/security/2011/dsa-2314
• http://www.ubuntu.com/usn/USN-1217-1
• https://groups.google.com/group/puppet-announce/browse_thread/thread/e57ce2740feb9406
• https://puppet.com/security/cve/cve-2011-3848