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Debian: Security Advisory for dovecot (DSA-4745-1)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
The remote host is missing an update for the 'dovecot' package(s) announced via the DSA-4745-1 advisory.
Insight
Insight
Several vulnerabilities have been discovered in the Dovecot email server. CVE-2020-12100 Receiving mail with deeply nested MIME parts leads to resource exhaustion as Dovecot attempts to parse it. CVE-2020-12673 Dovecot's NTLM implementation does not correctly check message buffer size, which leads to a crash when reading past allocation. CVE-2020-12674 Dovecot's RPA mechanism implementation accepts zero-length message, which leads to assert-crash later on.
Affected Software
Affected Software
'dovecot' package(s) on Debian Linux.
Detection Method
Detection Method
Checks if a vulnerable package version is present on the target host.
Solution
Solution
For the stable distribution (buster), these problems have been fixed in version 1:2.3.4.1-5+deb10u3. We recommend that you upgrade your dovecot packages.