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Dovecot 1.2.0 - 2.3.14 DoS Vulnerability
Information
Severity
Severity
Medium
Family
Family
Denial of Service
CVSSv2 Base
CVSSv2 Base
4.0
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:L/Au:S/C:N/I:N/A:P
Solution Type
Solution Type
Vendor Patch
Created
Created
2 years ago
Modified
Modified
2 years ago
Summary
Dovecot is prone to a denial of service (DoS) vulnerability.
Insight
Insight
Sieve interpreter is not protected against abusive scripts that claim excessive resource usage. Especially scripts using massive amounts of regexps.
Affected Software
Affected Software
Dovecot version 1.2.0 through 2.3.14.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Update to version 2.3.15 or later. Workaround: Disabling the regex sieve extension avoids the worst problems. lmtp_user_concurrency_limit may also be helpful.