CVE-2020-12100

Published: Aug 12, 2020Modified: Jun 17, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: NVD

Description

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.

Affected (10)

Products: Dovecot: Dovecot · Debian: Debian Linux · Fedoraproject: Fedora · +1 more

Show all products

Dovecot: Dovecot · Debian: Debian Linux · Fedoraproject: Fedora · Canonical: Ubuntu Linux

1 product

1 product

1 product

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Dovecot Dovecot	Before 2.3.11.3

Configuration B

2 vulnerable

Vulnerable Software	Affected Versions
Debian Debian Linux	Version 10.0
Debian Debian Linux	Version 9.0

Configuration C

3 vulnerable

Vulnerable Software	Affected Versions
Fedoraproject Fedora	Version 31
Fedoraproject Fedora	Version 32
Fedoraproject Fedora	Version 33

Configuration D

4 vulnerable

Vulnerable Software	Affected Versions
Canonical Ubuntu Linux	Version 14.04
Canonical Ubuntu Linux	Version 16.04
Canonical Ubuntu Linux	Version 18.04
Canonical Ubuntu Linux	Version 20.04

Related CWEs

CWE-674

Uncontrolled Recursion

The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

References (24)

http://seclists.org/fulldisclosure/2021/Jan/18

Source: cve@mitre.org

Mailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2020/08/12/1

Source: cve@mitre.org

ExploitMailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2021/01/04/3

Source: cve@mitre.org

Mailing ListThird Party Advisory

https://dovecot.org/security

Source: cve@mitre.org

Vendor Advisory

https://lists.debian.org/debian-lts-announce/2020/08/msg00024.html

Source: cve@mitre.org

Mailing ListThird Party Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4AAX2MJEULPVSRZOBX3PNPFSYP4FM4TT/

Source: cve@mitre.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EYZU6CHA3VMYYAUCMHSCCQKJEVEIKPQ2/

Source: cve@mitre.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XKKAL3OMG76ZZ7CIEMQP2K6KCTD2RAKE/

Source: cve@mitre.org

https://security.gentoo.org/glsa/202009-02

Source: cve@mitre.org

Third Party Advisory

https://usn.ubuntu.com/4456-1/

Source: cve@mitre.org

Third Party Advisory

https://usn.ubuntu.com/4456-2/

Source: cve@mitre.org

Third Party Advisory

https://www.debian.org/security/2020/dsa-4745

Source: cve@mitre.org

Third Party Advisory

http://seclists.org/fulldisclosure/2021/Jan/18