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CVE-2011-1506

6.8 · MEDIUM

The STARTTLS implementation in Kerio Connect 7.1.4 build 2985 and MailServer 6.x does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted…

Published Mar 22, 2011kerioCWE-20EPSS 2.47%

Overview

CVE-2011-1506 is a medium-severity vulnerability affecting kerio connect. It was published on March 22, 2011 and has a CVSS 2.0 base score of 6.8 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The STARTTLS implementation in Kerio Connect 7.1.4 build 2985 and MailServer 6.x does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack, a similar issue to CVE-2011-0411. NOTE: some of these details are obtained from third party information.

Remediation

Check the references section for vendor advisories and patches from kerio. Update connect to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refsecunia.com/advisories/43678Refwww.kb.cert.org/vuls/id/555316Refwww.kb.cert.org/vuls/id/MAPG-8D9M4PRefwww.securityfocus.com/bid/46767Refwww.vupen.com/english/advisories/2011/0610Refexchange.xforce.ibmcloud.com/vulnerabilities/65932Refsecunia.com/advisories/43678Refwww.kb.cert.org/vuls/id/555316Refwww.kb.cert.org/vuls/id/MAPG-8D9M4PRefwww.securityfocus.com/bid/46767

How CyberStrike helps

Frequently asked questions

What is CVE-2011-1506?

CVE-2011-1506 is a medium-severity vulnerability affecting kerio connect. It was published on March 22, 2011 and has a CVSS 2.0 base score of 6.8 (MEDIUM).

How severe is CVE-2011-1506?

This vulnerability has a CVSS 2.0 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2011-1506?

Check the references section for vendor advisories and patches from kerio. Update connect to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2011-1506?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-1506 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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