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Debian LTS Advisory DLA-2328-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/
August 15, 2020 https://wiki.debian.org/LTS
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Package : dovecot
Version : 1:2.2.27-3+deb9u6
CVE ID : CVE-2020-12100 CVE-2020-12673 CVE-2020-12674
Debian Bug : 968302
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.
For Debian 9 stretch, these problems have been fixed in version
1:2.2.27-3+deb9u6.
We recommend that you upgrade your dovecot packages.
For the detailed security status of dovecot please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/dovecot
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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