-------------------------------------------------------------------------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
-------------------------------------------------------------------------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/source-package/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

Debian LTS: DLA-2328-1: dovecot security update

August 15, 2020
Several vulnerabilities have been discovered in the Dovecot email server

Summary


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/source-package/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


Severity
-------------------------------------------------------------------------Package : dovecot
Version : 1:2.2.27-3+deb9u6
CVE ID : CVE-2020-12100 CVE-2020-12673 CVE-2020-12674
Debian Bug : 968302

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