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CVE Record

CVE-2011-1506: The STARTTLS implementation in Kerio Connect 7.1.4 build 2985 and MailServer 6.x does not properly restrict...

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.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

This CVE affects STARTTLS handling in Kerio Connect 7.1.4 build 2985 and MailServer 6.x. A network attacker positioned between a mail client/server and the SMTP service could inject a cleartext command that is processed after TLS starts, undermining assumptions that the session is protected. Exposure is most likely in legacy Kerio Connect 7.1.4 build 2985 or Kerio MailServer 6.x SMTP deployments using STARTTLS on networks where man-in-the-middle positioning is plausible. Current exposure depends on whether those versions remain in service. Treat as a legacy mail-platform risk requiring inventory and remediation planning. It is not KEV-listed in the provided bundle, but affected internet-facing mail systems could expose sensitive mail workflows if an attacker can intercept traffic. Mitigation focus: Inventory Kerio Connect and Kerio MailServer versions in all mail environments.; Check Kerio or successor vendor guidance for patched or supported versions.; Upgrade or replace affected legacy versions where vendor guidance supports it..

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Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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2Source links

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