SB2011032203 - MitM attack in Kerio Connect
Published: March 22, 2011 Updated: June 8, 2025
Security Bulletin ID
SB2011032203
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Man-in-the-Middle (MitM) attack (CVE-ID: CVE-2011-1506)
CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to incorrect implementation of STARTTLS command. A remote attacker can insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place and perform MitM attack.
Remediation
Install update from vendor's website.