CVE-2020-12100

Public Exploit

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 19.95% Top 5%
Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory dovecot.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://dovecot.org/security vendor advisory
http://www.openwall.com/lists/oss-security/2020/08/12/1 mailing list exploit third party advisory
https://www.debian.org/security/2020/dsa-4745 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00024.html third party advisory mailing list
https://usn.ubuntu.com/4456-1/ third party advisory vendor advisory
https://usn.ubuntu.com/4456-2/ third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4AAX2MJEULPVSRZOBX3PNPFSYP4FM4TT/ vendor advisory
https://security.gentoo.org/glsa/202009-02 third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XKKAL3OMG76ZZ7CIEMQP2K6KCTD2RAKE/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EYZU6CHA3VMYYAUCMHSCCQKJEVEIKPQ2/ vendor advisory
http://www.openwall.com/lists/oss-security/2021/01/04/3 third party advisory mailing list
http://seclists.org/fulldisclosure/2021/Jan/18 third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2020-12100?
CVE-2020-12100 has been scored as a high severity vulnerability.
How to fix CVE-2020-12100?
To fix CVE-2020-12100, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-12100 being actively exploited in the wild?
It is possible that CVE-2020-12100 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~20% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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