[SECURITY] [DSA 4745-1] dovecot security update
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Debian Security Advisory DSA-4745-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
August 12, 2020 https://www.debian.org/security/faq
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Package : dovecot
CVE ID : CVE-2020-12100 CVE-2020-12673 CVE-2020-12674
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 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.
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 Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
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