CVE-2020-12100

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

5.25% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 92.2% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2020-08-12 15:07Z6 YR AGO

Last updated

2024-08-04 11:48Z2 YR AGO

Reserved

2020-04-23

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-674Uncontrolled RecursionClass

Data version

5.1

Document digest

308fb11f335050781abf78d7e0e14fd5d2c03863218d1ac2cbe71936c7207efd

• dovecot.orghttps://dovecot.org/securityx_refsource_MISC
• www.openwall.com[oss-security] 20200812 CVE-2020-12100: Dovecot IMAP server: Receiving mail with deeply nested MIME parts leads to resource exhaustionhttp://www.openwall.com/lists/oss-security/2020/08/12/1mailing-listx_refsource_MLIST
• www.debian.orgDSA-4745https://www.debian.org/security/2020/dsa-4745vendor-advisoryx_refsource_DEBIAN
• lists.debian.org[debian-lts-announce] 20200815 [SECURITY] [DLA 2328-1] dovecot security updatehttps://lists.debian.org/debian-lts-announce/2020/08/msg00024.htmlmailing-listx_refsource_MLIST
• usn.ubuntu.comUSN-4456-1https://usn.ubuntu.com/4456-1/vendor-advisoryx_refsource_UBUNTU
• usn.ubuntu.comUSN-4456-2https://usn.ubuntu.com/4456-2/vendor-advisoryx_refsource_UBUNTU
• lists.fedoraproject.orgFEDORA-2020-cd8b8f887bhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4AAX2MJEULPVSRZOBX3PNPFSYP4FM4TT/vendor-advisoryx_refsource_FEDORA
• security.gentoo.orgGLSA-202009-02https://security.gentoo.org/glsa/202009-02vendor-advisoryx_refsource_GENTOO
• lists.fedoraproject.orgFEDORA-2020-b8ebc4201ehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XKKAL3OMG76ZZ7CIEMQP2K6KCTD2RAKE/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2020-d737c57172https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EYZU6CHA3VMYYAUCMHSCCQKJEVEIKPQ2/vendor-advisoryx_refsource_FEDORA
• www.openwall.com[oss-security] 20210104 CVE-2020-25275: Dovecot: MIME parsing crashhttp://www.openwall.com/lists/oss-security/2021/01/04/3mailing-listx_refsource_MLIST
• seclists.org20210106 CVE-2020-24386: IMAP hibernation allows accessing other peoples mailhttp://seclists.org/fulldisclosure/2021/Jan/18mailing-listx_refsource_FULLDISC