PT-2021-3384 · Dovecot+3 · Dovecot+3

Innokentii Sennovskii + 1 · Published 2021-06-21 · Updated 2025-01-30 · CVE-2020-28200

Positive Technologies (AI Summary)

CVSS v2.0

5.0

Medium

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Name of the Vulnerable Software and Affected Versions Dovecot versions prior to 2.3.15

Description The issue is related to errors in resource management in the Dovecot mail server, which can be exploited by a remote attacker to cause a denial of service. The Sieve engine in Dovecot is affected, particularly when handling complex regular expressions for the regex extension, leading to uncontrolled resource consumption.

Recommendations For versions prior to 2.3.15, update to version 2.3.15 or later to resolve the issue. As a temporary workaround, consider restricting the use of complex regular expressions in the Sieve engine to minimize the risk of exploitation.

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

CWE-399

Related Identifiers

ALT-PU-2021-2500

ALT-PU-2021-2537

ALT-PU-2021-2548

ALT-PU-2021-2579

AZL-7194

BDU:2021-03235

CVE-2020-28200

MGASA-2021-0557

OESA-2021-1270

OPENSUSE-SU-2021:1225-1

OPENSUSE-SU-2021:2892-1

OPENSUSE-SU-2021_1225-1

OPENSUSE-SU-2021_2892-1

OPENSUSE-SU-2024:10726-1

OPENSUSE-SU-2025:14715-1

SUSE-SU-2021:2890-1

SUSE-SU-2021:2891-1

SUSE-SU-2021:2892-1

SUSE-SU-2021_2890-1

SUSE-SU-2021_2891-1

SUSE-SU-2021_2892-1

Affected Products

Alt Linux

Debian

Dovecot

Suse

References · 68

• https://osv.dev/vulnerability/UBUNTU-CVE-2020-28200 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2025:14715-1 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TK424DWFO2TKJYXZ2H3XL633TYJL4GQN · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-28200 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-28200 · Security Note
• https://ubuntu.com/security/CVE-2020-28200 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:1225-1 · Vendor Advisory
• https://dovecot.org/security · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:2892-1 · Vendor Advisory
• https://osv.dev/vulnerability/AZL-7194 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:2890-1 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2021-0557.html · Security Note
• https://osv.dev/vulnerability/OESA-2021-1270 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-28200 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-03235 · Security Note