// For flags

CVE-2020-10967

dovecot: sending mail with empty quoted localpart leads to DoS

Severity Score

5.3
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

2
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

In Dovecot before 2.3.10.1, remote unauthenticated attackers can crash the lmtp or submission process by sending mail with an empty localpart.

En Dovecot versiones anteriores a 2.3.10.1, los atacantes remotos no autenticados pueden bloquear el proceso lmtp o submission mediante el envío de un correo con un localpart vacío.

Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind. It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages. Issues addressed include denial of service and use-after-free vulnerabilities.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-03-26 CVE Reserved
  • 2020-05-18 CVE Published
  • 2020-05-19 First Exploit
  • 2024-08-04 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-20: Improper Input Validation
  • CWE-400: Uncontrolled Resource Consumption
CAPEC
References (16)
URL Tag Source
http://packetstormsecurity.com/files/157771/Open-Xchange-Dovecot-2.3.10-Null-Pointer-Dereference-Denial-Of-Service.html X_refsource_misc
http://www.openwall.com/lists/oss-security/2020/05/18/1 Mailing List
https://www.openwall.com/lists/oss-security/2020/05/18/1 Mailing List
URL Date SRC
https://packetstorm.news/files/id/157771 2020-05-19
http://seclists.org/fulldisclosure/2020/May/37 2024-08-04
URL Date SRC
URL Date SRC
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00059.html 2023-11-07
https://dovecot.org/security 2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4AAX2MJEULPVSRZOBX3PNPFSYP4FM4TT 2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EYZU6CHA3VMYYAUCMHSCCQKJEVEIKPQ2 2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TTZN2VW55ZC2AQBGBJMLRJSZIKSB2NS6 2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VVUWHUUAFPC6XGIXYFIPTNBXLHPNM4W6 2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XKKAL3OMG76ZZ7CIEMQP2K6KCTD2RAKE 2023-11-07
https://usn.ubuntu.com/4361-1 2023-11-07
https://www.debian.org/security/2020/dsa-4690 2023-11-07
https://access.redhat.com/security/cve/CVE-2020-10967 2020-11-04
https://bugzilla.redhat.com/show_bug.cgi?id=1834326 2020-11-04
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Dovecot
Search vendor "Dovecot"
 Dovecot
Search vendor "Dovecot" for product "Dovecot"
 < 2.3.10.1
Search vendor "Dovecot" for product "Dovecot" and version " < 2.3.10.1"
-
Affected