Vulnerability CVE-2020-28200

Vulnerability Name:

CVE-2020-28200 (CCN-204480)

Assigned:

2020-11-04

Published:

2021-06-28

Updated:

2022-05-03

Summary:

The Sieve engine in Dovecot before 2.3.15 allows Uncontrolled Resource Consumption, as demonstrated by a situation with a complex regular expression for the regex extension.

CVSS v3 Severity:

4.3 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L)
3.8 Low (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:U/RC:R)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Low

4.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L)
3.8 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:U/RC:R)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Low

CVSS v2 Severity:

4.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

4.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

Vulnerability Type:

CWE-770

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2020-28200

Source: MISC
Type: Vendor Advisory
https://dovecot.org/security

Source: XF
Type: UNKNOWN
dovecot-cve202028200-dos(204480)

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-208340a217

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-891c1ab1ac

Source: CCN
Type: oss-sec Mailing List, Mon, 28 Jun 2021 10:02:07 +0300
CVE-2020-28200: Dovecot Pigeonhole Sieve excessive resource usage

Source: CCN
Type: Dovecot Web site
Dovecot

Source: CONFIRM
Type: Mailing List, Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/06/28/3

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2020-28200

Vulnerable Configuration:

Configuration 1:

cpe:/a:dovecot:dovecot:*:*:*:*:*:*:*:* (Version < 2.3.15)

Configuration 2:

cpe:/o:fedoraproject:fedora:33:*:*:*:*:*:*:*

OR cpe:/o:fedoraproject:fedora:34:*:*:*:*:*:*:*

Configuration CCN 1:

cpe:/a:dovecot:dovecot:-:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.opensuse.security:def:7986	P	ant-1.10.12-150200.4.12.5 on GA media (Moderate)	2023-06-20
oval:org.opensuse.security:def:8049	P	pam-devel-32bit-1.3.0-150000.6.61.1 on GA media (Moderate)	2023-06-20
oval:org.opensuse.security:def:3473	P	dnsmasq-2.78-18.9.1 on GA media (Moderate)	2022-06-28
oval:org.opensuse.security:def:95103	P	dovecot23-2.3.15-58.3 on GA media (Moderate)	2022-06-22
oval:org.opensuse.security:def:93132	P	(Important)	2022-05-03
oval:org.opensuse.security:def:99731	P	(Important)	2022-04-12
oval:org.opensuse.security:def:112172	P	dovecot23-2.3.16-1.6 on GA media (Moderate)	2022-01-17
oval:org.opensuse.security:def:105704	P	dovecot23-2.3.16-1.6 on GA media (Moderate)	2021-10-01
oval:org.opensuse.security:def:111042	P	Security update for dovecot23 (Moderate)	2021-09-04
oval:org.opensuse.security:def:99139	P	(Important)	2021-09-02
oval:org.opensuse.security:def:70473	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:10333	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:8645	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:1626	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:92582	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:69723	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:9583	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:109423	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:100041	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:93285	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:91994	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:69075	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:8833	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:99333	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:92781	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:69922	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:9782	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:102757	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:96067	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:92189	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:69138	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:9028	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:111696	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:99532	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:92979	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:70285	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:10145	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:102202	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:98944	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:92383	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:69531	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:9391	P	Security update for dovecot23 (Moderate)	2021-08-31
oval:org.opensuse.security:def:118519	P	Security update for dovecot23 (Moderate)	2021-08-31

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