Debian Security Advisory

DSA-4825-1 dovecot -- security update

Date Reported:
04 Jan 2021
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2020-24386, CVE-2020-25275.
More information:

Several vulnerabilities have been discovered in the Dovecot email server.

  • CVE-2020-24386

    When imap hibernation is active, an attacker (with valid credentials to access the mail server) can cause Dovecot to discover file system directory structures and access other users' emails via specially crafted commands.

  • CVE-2020-25275

    Innokentii Sennovskiy reported that the mail delivery and parsing in Dovecot can crash when the 10000th MIME part is message/rfc822 (or if the parent was multipart/digest). This flaw was introduced by earlier changes addressing CVE-2020-12100.

For the stable distribution (buster), these problems have been fixed in version 1:

We recommend that you upgrade your dovecot packages.

For the detailed security status of dovecot please refer to its security tracker page at: