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Dovecot 2.3.11.3 Denial Of Service Vulnerability
| Reporter | Title | Published | Views | Family All 212 |
|---|---|---|---|---|
 | Security fix for the ALT Linux 9 package dovecot version 2.3.11.3-alt1 | 7 Dec 202000:00 | – | altlinux |
| Security fix for the ALT Linux 9 package dovecot version 2.3.13-alt1 | 18 Jan 202100:00 | – | altlinux |
 | mail/dovecot -- multiple vulnerabilities | 23 Apr 202000:00 | – | freebsd |
| mail/dovecot -- multiple vulnerabilities | 17 Aug 202000:00 | – | freebsd |
 | Amazon Linux 2 : dovecot (ALAS-2020-1489) | 17 Sep 202000:00 | – | nessus |
| Amazon Linux AMI : dovecot (ALAS-2020-1435) | 28 Oct 202000:00 | – | nessus |
| Alibaba Cloud Linux 3 : 0115: dovecot (ALINUX3-SA-2022:0115) | 14 May 202500:00 | – | nessus |
| AlmaLinux 8 : dovecot (ALSA-2021:1887) | 9 Feb 202200:00 | – | nessus |
| CentOS 8 : dovecot (CESA-2020:3713) | 1 Feb 202100:00 | – | nessus |
| CentOS 8 : dovecot (CESA-2021:1887) | 19 May 202100:00 | – | nessus |
10
Dovecot 2.3.11.3 Denial Of Service Vulnerability
Vendor: OX Software GmbH
Internal reference: DOV-4113 (Bug ID)
Vulnerability type: CWE-20: Improper Input Validation
Vulnerable version: 2.3.11-2.3.11.3
Vulnerable component: lda, lmtp, imap
Report confidence: Confirmed
Solution status: Fixed by Vendor
Fixed version: 2.3.13
Vendor notification: 2020-09-10
Solution date: 2020-09-14
Public disclosure: 2021-01-04
CVE reference: CVE-2020-25275
CVSS: 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
Researcher credit: Innokentii Sennovskiy (Rumata888) from BI.ZONE
Vulnerability Details:
Mail delivery / parsing crashed when the 10 000th MIME part was
message/rfc822 (or if parent was multipart/digest). This happened
due to earlier MIME parsing changes for CVE-2020-12100.
Risk:
Malicious sender can crash dovecot repeatedly by sending / uploading
message with more than 10 000 MIME parts.
Workaround:
These are usually dropped by MTA, where the mitigation can also be applied.
Solution:
Operators should update to 2.3.13 or later version.
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07 Jan 2021 00:00Current
CVSS 25
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EPSS0.19614