CVE-2020-12100

high-risk

Published 2020-08-12

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.

Do I need to act?

19.6% chance of exploitation in next 30 days

EPSS score — higher than 80% of all CVEs

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.5/10 High

NETWORK / LOW complexity

Affected Products (10)

Dovecot

Debian Linux

Fedora

Ubuntu Linux

Affected Vendors

Debian Canonical Fedoraproject Dovecot

References (24)

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

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

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

Vendor Advisory https://dovecot.org/security

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

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

Third Party Advisory https://security.gentoo.org/glsa/202009-02

Third Party Advisory https://usn.ubuntu.com/4456-1/

Third Party Advisory https://usn.ubuntu.com/4456-2/

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

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

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

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

Vendor Advisory https://dovecot.org/security

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

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

and 4 more references

/ 100

high-risk

Severity 26/34 · High

Exploitability 14/34 · Moderate

Exposure 16/34 · Moderate