medium
6.8
CWE
20 77
Advisory Published
Updated

CVE-2011-1506: Input Validation

First published: Tue Mar 22 2011(Updated: )

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.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
GFI KerioConnect=7.1.4
Kerio MailServer=5.0
Kerio MailServer=5.1
Kerio MailServer=5.1.1
Kerio MailServer=5.6.3
Kerio MailServer=5.6.4
Kerio MailServer=5.6.5
Kerio MailServer=5.7.0
Kerio MailServer=5.7.1
Kerio MailServer=5.7.2
Kerio MailServer=5.7.3
Kerio MailServer=5.7.4
Kerio MailServer=5.7.5
Kerio MailServer=5.7.6
Kerio MailServer=5.7.7
Kerio MailServer=5.7.8
Kerio MailServer=5.7.9
Kerio MailServer=5.7.10
Kerio MailServer=6.0
Kerio MailServer=6.0.0
Kerio MailServer=6.0.1
Kerio MailServer=6.0.2
Kerio MailServer=6.0.3
Kerio MailServer=6.0.4
Kerio MailServer=6.0.5
Kerio MailServer=6.0.6
Kerio MailServer=6.0.7
Kerio MailServer=6.0.8
Kerio MailServer=6.0.9
Kerio MailServer=6.0.10
Kerio MailServer=6.1.1
Kerio MailServer=6.1.2
Kerio MailServer=6.1.3
Kerio MailServer=6.1.3_patch_1
Kerio MailServer=6.1.4
Kerio MailServer=6.2.0
Kerio MailServer=6.2.1
Kerio MailServer=6.2.2
Kerio MailServer=6.3.0
Kerio MailServer=6.3.1
Kerio MailServer=6.3.1_p1
Kerio MailServer=6.3.1_p2
Kerio MailServer=6.4.0
Kerio MailServer=6.4.1
Kerio MailServer=6.4.2
Kerio MailServer=6.5.0
Kerio MailServer=6.5.0-patch_1
Kerio MailServer=6.5.1
Kerio MailServer=6.5.2
Kerio MailServer=6.6.0
Kerio MailServer=6.6.0-patch_1
Kerio MailServer=6.6.1
Kerio MailServer=6.6.2
Kerio MailServer=6.7.0
Kerio MailServer=6.7.1
Kerio MailServer=6.7.2
Kerio MailServer=6.7.3

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2011-1506?

    CVE-2011-1506 is classified as a medium severity vulnerability due to its potential to allow man-in-the-middle attacks during encrypted SMTP sessions.

  • How do I fix CVE-2011-1506?

    To fix CVE-2011-1506, update your Kerio Connect or Kerio MailServer to the latest version that addresses this vulnerability.

  • What systems are affected by CVE-2011-1506?

    CVE-2011-1506 affects Kerio Connect version 7.1.4 and several versions of Kerio MailServer from 5.0 to 6.7.3.

  • Can a man-in-the-middle attack exploit CVE-2011-1506?

    Yes, CVE-2011-1506 allows an attacker to insert commands into an encrypted SMTP session, enabling man-in-the-middle attacks.

  • Is there a workaround for CVE-2011-1506 if I cannot update?

    If an update is not possible, consider implementing additional network security measures to monitor and restrict unauthorized access.

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