PT-2020-12448 · Dovecot+6 · Dovecot+6

Philippe Antoine · Published 2020-05-18 · Updated 2025-01-30 · CVE-2020-10957

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Dovecot versions prior to 2.3.10.1

Description The issue arises from sending malformed parameters to a NOOP command, which causes a NULL Pointer Dereference and crash in submission-login, submission, or lmtp. This can be triggered without authentication.

Recommendations For versions prior to 2.3.10.1, update to version 2.3.10.1 or later to resolve the issue. As a temporary workaround, consider restricting access to the NOOP command to prevent unauthenticated sending of malformed parameters.

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALT-PU-2020-1984

ALT-PU-2020-1989

CESA-2020_2901

CVE-2020-10957

DSA-4690-1

MGASA-2020-0222

OPENSUSE-SU-2020:0720-1

OPENSUSE-SU-2020_0720-1

OPENSUSE-SU-2024:10726-1

OPENSUSE-SU-2025:14715-1

RHSA-2020:2901

RHSA-2020_2901

SUSE-SU-2020:1379-1

SUSE-SU-2020:1380-1

SUSE-SU-2020_1379-1

SUSE-SU-2020_1380-1

USN-4361-1

Affected Products

Alt Linux

Centos

Dovecot

Linuxmint

Red Hat

Suse

Ubuntu

References · 65

• 🔥 http://seclists.org/fulldisclosure/2020/May/37 · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-10957 · Vendor Advisory
• https://dovecot.org/security · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2020-10957 · Vendor Advisory
• https://osv.dev/vulnerability/USN-4361-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-10957 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2020-0222.html · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2020:1379-1 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2020-0222 · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00059.html · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4690-1 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TTZN2VW55ZC2AQBGBJMLRJSZIKSB2NS6 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-10957 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:1380-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-4361-1 · Vendor Advisory