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Last updated: 12/18/2014 11:48:55 PM

CVE Publication rate: 20.3

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Vulnerability Workload Index: 8.66
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National Cyber Awareness System

Vulnerability Summary for CVE-2011-1506

Original release date: 03/22/2011
Last revised: 03/24/2011


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.


CVSS Severity (version 2.0):
CVSS v2 Base Score: 6.8 (MEDIUM) (AV:N/AC:M/Au:N/C:P/I:P/A:P) (legend)
Impact Subscore: 6.4
Exploitability Subscore: 8.6
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

References to Advisories, Solutions, and Tools

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External Source: VUPEN
Name: ADV-2011-0610
Type: Advisory
External Source: XF
Name: multiple-starttls-command-execution(65932)
US-CERT Vulnerability Note: CERT-VN
Name: VU#555316
External Source: BID
Name: 46767
External Source: SECUNIA
Name: 43678
Type: Advisory
US-CERT Vulnerability Note: CONFIRM
Name: http://www.kb.cert.org/vuls/id/MAPG-8D9M4P

Vulnerable software and versions

+ Configuration 1
+ OR
* cpe:/a:kerio:kerio_mailserver:6.4.0
* cpe:/a:kerio:kerio_mailserver:6.3.1_p2
* cpe:/a:kerio:kerio_mailserver:6.3.1_p1
* cpe:/a:kerio:kerio_mailserver:6.3.1
* cpe:/a:kerio:kerio_mailserver:6.3.0
* cpe:/a:kerio:kerio_mailserver:6.2.2
* cpe:/a:kerio:kerio_mailserver:6.0.10
* cpe:/a:kerio:kerio_mailserver:6.0.9
* cpe:/a:kerio:kerio_mailserver:6.0.6
* cpe:/a:kerio:kerio_mailserver:6.4.2
* cpe:/a:kerio:kerio_mailserver:6.0.7
* cpe:/a:kerio:kerio_mailserver:6.0.4
* cpe:/a:kerio:kerio_mailserver:6.0.5
* cpe:/a:kerio:kerio_mailserver:6.4.1
* cpe:/a:kerio:kerio_mailserver:6.0.2
* cpe:/a:kerio:kerio_mailserver:6.0.3
* cpe:/a:kerio:kerio_mailserver:6.0.0
* cpe:/a:kerio:kerio_mailserver:6.0.1
* cpe:/a:kerio:kerio_mailserver:6.2.0
* cpe:/a:kerio:kerio_mailserver:6.2.1
* cpe:/a:kerio:kerio_mailserver:6.1.3_patch_1
* cpe:/a:kerio:kerio_mailserver:6.1.4
* cpe:/a:kerio:kerio_mailserver:6.1.2
* cpe:/a:kerio:kerio_mailserver:6.1.3
* cpe:/a:kerio:kerio_mailserver:6.0.8
* cpe:/a:kerio:kerio_mailserver:6.1.1
* cpe:/a:kerio:kerio_mailserver:6.7.0
* cpe:/a:kerio:kerio_mailserver:6.6.2
* cpe:/a:kerio:kerio_mailserver:6.6.0
* cpe:/a:kerio:kerio_mailserver:5.6.3
* cpe:/a:kerio:kerio_mailserver:5.1.1
* cpe:/a:kerio:kerio_mailserver:6.5.2
* cpe:/a:kerio:kerio_mailserver:5.6.5
* cpe:/a:kerio:kerio_mailserver:6.5.1
* cpe:/a:kerio:kerio_mailserver:5.6.4
* cpe:/a:kerio:kerio_mailserver:6.5.0
* cpe:/a:kerio:kerio_mailserver:5.7.1
* cpe:/a:kerio:kerio_mailserver:5.7.0
* cpe:/a:kerio:kerio_mailserver:6.6.1
* cpe:/a:kerio:kerio_mailserver:5.7.2
* cpe:/a:kerio:kerio_mailserver:6.6.0:patch_1
* cpe:/a:kerio:kerio_mailserver:5.7.10
* cpe:/a:kerio:kerio_mailserver:5.7.4
* cpe:/a:kerio:kerio_mailserver:5.7.3
* cpe:/a:kerio:kerio_mailserver:5.7.6
* cpe:/a:kerio:kerio_mailserver:5.7.5
* cpe:/a:kerio:kerio_mailserver:5.7.8
* cpe:/a:kerio:kerio_mailserver:6.5.0:patch_1
* cpe:/a:kerio:kerio_mailserver:5.7.7
* cpe:/a:kerio:kerio_mailserver:6.0
* cpe:/a:kerio:kerio_mailserver:5.7.9
* cpe:/a:kerio:kerio_mailserver:5.0
* cpe:/a:kerio:kerio_mailserver:5.1
* cpe:/a:kerio:kerio_mailserver:6.7.1
* cpe:/a:kerio:kerio_mailserver:6.7.2
* cpe:/a:kerio:kerio_mailserver:6.7.3
+ Configuration 2
+ OR
* cpe:/a:kerio:connect:7.1.4

* Denotes Vulnerable Software
Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)