high
7.5
CWE
674
Advisory Published
Updated

CVE-2020-12100

First published: Wed Aug 12 2020(Updated: )

In Dovecot before 2.3.11.3, uncontrolled recursion in submission, lmtp, and lda allows remote attackers to cause a denial of service (resource consumption) via a crafted e-mail message with deeply nested MIME parts.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
ubuntu/dovecot<1:2.2.33.2-1ubuntu4.6
1:2.2.33.2-1ubuntu4.6
ubuntu/dovecot<1:2.3.7.2-1ubuntu3.2
1:2.3.7.2-1ubuntu3.2
ubuntu/dovecot<1:2.2.9-1ubuntu2.6+
1:2.2.9-1ubuntu2.6+
ubuntu/dovecot<2.3.11
2.3.11
ubuntu/dovecot<1:2.2.22-1ubuntu2.13
1:2.2.22-1ubuntu2.13
<2.3.11.3
=9.0
=10.0
=31
=32
=33
=14.04
=16.04
=18.04
=20.04
Dovecot Dovecot<2.3.11.3
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Fedoraproject Fedora=31
Fedoraproject Fedora=32
Fedoraproject Fedora=33
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=20.04
debian/dovecot
1:2.3.4.1-5+deb10u6
1:2.3.4.1-5+deb10u7
1:2.3.13+dfsg1-2+deb11u1
1:2.3.19.1+dfsg1-2.1
1:2.3.21+dfsg1-2

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2020-12100?

    CVE-2020-12100 is a vulnerability in Dovecot that allows remote attackers to cause a denial of service by sending a crafted e-mail message with deeply nested MIME parts.

  • What is the severity of CVE-2020-12100?

    The severity of CVE-2020-12100 is high with a severity value of 7.5.

  • How does CVE-2020-12100 affect Dovecot?

    CVE-2020-12100 affects versions of Dovecot before 2.3.11.3.

  • How can I fix CVE-2020-12100?

    To fix CVE-2020-12100, update Dovecot to version 2.3.11.3 or later.

  • Where can I find more information about CVE-2020-12100?

    You can find more information about CVE-2020-12100 on the following websites: [http://seclists.org/fulldisclosure/2021/Jan/18](http://seclists.org/fulldisclosure/2021/Jan/18), [http://www.openwall.com/lists/oss-security/2020/08/12/1](http://www.openwall.com/lists/oss-security/2020/08/12/1), [http://www.openwall.com/lists/oss-security/2021/01/04/3](http://www.openwall.com/lists/oss-security/2021/01/04/3).

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