PT-2020-12449 · Dovecot+7 · Dovecot+7

Philippe Antoine · Published 2020-05-18 · Updated 2025-01-30 · CVE-2020-10958

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

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

Description A crafted SMTP/LMTP message can trigger an unauthenticated use-after-free bug in submission-login, submission, or lmtp, leading to a crash under circumstances involving many newlines after a command.

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 the submission-login, submission, or lmtp services to minimize the risk of exploitation.

Exploit

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALSA-2020:4763

ALT-PU-2020-1984

ALT-PU-2020-1989

CESA-2020_4763

CVE-2020-10958

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-2020:4763

RHSA-2020_4763

SUSE-SU-2020:1379-1

SUSE-SU-2020:1380-1

USN-4361-1

Affected Products

Alt Linux

Almalinux

Centos

Dovecot

Linuxmint

Red Hat

Suse

Ubuntu

References · 68

• 🔥 http://seclists.org/fulldisclosure/2020/May/37 · Exploit
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TTZN2VW55ZC2AQBGBJMLRJSZIKSB2NS6 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2020-4763.html · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-10958 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2020:1380-1 · Vendor Advisory
• https://dovecot.org/security · Vendor Advisory
• https://osv.dev/vulnerability/USN-4361-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-4361-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-10958 · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2020:4763 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2020:0720-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-10958 · Security Note
• 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