CVE-2020-25275

dovecot: Denial of service via mail MIME parsing

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Severity

Low

Red Hat Product Security

7.5

CVSS 3.1

Review impact separately from score.

Published · January 4, 2021

Updated · November 22, 2025

Description

Dovecot before 2.3.13 has Improper Input Validation in lda, lmtp, and imap, leading to an application crash via a crafted email message with certain choices for ten thousand MIME parts.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

A potential mitigation is configuring the mail transfer agent to not accept messages with more than 10,000 MIME parts.

CVSS / CWE

CVSS 3.1 · 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-20 · Improper Input Validation