CVE-2020-10957

dovecot: malformed NOOP commands leads to DoS

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In Dovecot before 2.3.10.1, unauthenticated sending of malformed parameters to a NOOP command causes a NULL Pointer Dereference and crash in submission-login, submission, or lmtp.

En Dovecot versiones anteriores a 2.3.10.1, el envío no autenticado de parámetros malformados hacia un comando NOOP causa una Desreferencia del Puntero NULL y un bloqueo en submission-login o lmtp.

A flaw was found in Dovecot, where it did not properly handle certain malformed NOOP commands. This flaw allows a malicious attacker to cause the submission, submission-login, or lmtp services to crash by sending specially crafted commands.

Open-Xchange Dovecot versions 2.3.0 through 2.3.10 suffer from null pointer dereference and denial of service 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

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

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

2020-03-25 CVE Reserved
2020-05-18 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-09-11 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-400: Uncontrolled Resource Consumption
CWE-476: NULL Pointer Dereference

CAPEC

References (12)

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
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/TTZN2VW55ZC2AQBGBJMLRJSZIKSB2NS6	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VVUWHUUAFPC6XGIXYFIPTNBXLHPNM4W6	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-2020-10957	2020-07-13
https://bugzilla.redhat.com/show_bug.cgi?id=1834317	2020-07-13

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