Vulnerability Name:

CVE-2020-12100 (CCN-186666)

Assigned:2020-08-12
Published:2020-08-12
Updated:2022-10-29
Summary:In Dovecot before 2.3.11.3, uncontrolled recursion in submission, lmtp, and lda allows remote attackers to cause a denial of service (resource consumption) via a crafted e-mail message with deeply nested MIME parts.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
7.5 High (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-674
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2020-12100

Source: FULLDISC
Type: Mailing List, Third Party Advisory
20210106 CVE-2020-24386: IMAP hibernation allows accessing other peoples mail

Source: MLIST
Type: Exploit, Mailing List, Third Party Advisory
[oss-security] 20200812 CVE-2020-12100: Dovecot IMAP server: Receiving mail with deeply nested MIME parts leads to resource exhaustion

Source: MLIST
Type: Mailing List, Third Party Advisory
[oss-security] 20210104 CVE-2020-25275: Dovecot: MIME parsing crash

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

Source: XF
Type: UNKNOWN
dovecot-cve202012100-dos(186666)

Source: MLIST
Type: Mailing List, Third Party Advisory
[debian-lts-announce] 20200815 [SECURITY] [DLA 2328-1] dovecot security update

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2020-cd8b8f887b

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2020-d737c57172

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2020-b8ebc4201e

Source: CCN
Type: oss-sec Mailing List, Wed, 12 Aug 2020 16:07:36 +0300
CVE-2020-12100: Dovecot IMAP server: Receiving mail with deeply nested MIME parts leads to resource exhaustion

Source: GENTOO
Type: Third Party Advisory
GLSA-202009-02

Source: UBUNTU
Type: Third Party Advisory
USN-4456-1

Source: UBUNTU
Type: Third Party Advisory
USN-4456-2

Source: DEBIAN
Type: Third Party Advisory
DSA-4745

Source: CCN
Type: Dovecot Web site
Dovecot IMAP server

Vulnerable Configuration:Configuration 1:
  • cpe:/a:dovecot:dovecot:*:*:*:*:*:*:*:* (Version < 2.3.11.3)

    • Configuration 2:
  • cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*
  • OR cpe:/o:debian:debian_linux:10.0:*:*:*:*:*:*:*

    • Configuration 3:
  • cpe:/o:fedoraproject:fedora:31:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:32:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:33:*:*:*:*:*:*:*

    • Configuration 4:
  • cpe:/o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*

    • Configuration RedHat 1:
  • cpe:/o:redhat:enterprise_linux:7:*:*:*:*:*:*:*

    • Configuration RedHat 2:
  • cpe:/o:redhat:enterprise_linux:7::server:*:*:*:*:*

    • Configuration RedHat 3:
  • cpe:/o:redhat:enterprise_linux:7::workstation:*:*:*:*:*

    • Configuration RedHat 4:
  • cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*

    • Configuration RedHat 5:
  • cpe:/a:redhat:enterprise_linux:8::appstream:*:*:*:*:*

    • Configuration RedHat 6:
  • cpe:/a:redhat:enterprise_linux:8::crb:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:7908
    P
    		libIlmImf-2_2-23-2.2.1-3.41.1 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:7982
    P
    		wavpack-5.4.0-150000.4.15.1 on GA media (Moderate)
    2023-06-12
    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: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:2235
    P
    		dovecot23-2.3.11.3-17.5.1 on GA media (Moderate)
    2021-08-10
    oval:org.opensuse.security:def:63324
    P
    		dovecot23-2.3.11.3-17.5.1 on GA media (Moderate)
    2021-08-10
    oval:org.opensuse.security:def:110668
    P
    		Security update for dovecot23 (Important)
    2021-01-16
    oval:org.opensuse.security:def:111210
    P
    		Security update for dovecot23 (Important)
    2021-01-07
    oval:org.opensuse.security:def:70286
    P
    		Security update for dovecot23 (Important)
    2021-01-05
    oval:org.opensuse.security:def:8646
    P
    		Security update for dovecot23 (Important)
    2021-01-05
    oval:org.opensuse.security:def:102753
    P
    		Security update for dovecot23 (Important)
    2021-01-05
    oval:org.opensuse.security:def:68997
    P
    		Security update for dovecot23 (Important)
    2021-01-05
    oval:org.opensuse.security:def:97170
    P
    		Security update for dovecot23 (Important)
    2021-01-05
    oval:org.opensuse.security:def:91791
    P
    		Security update for dovecot23 (Important)
    2021-01-05
    oval:org.opensuse.security:def:9392
    P
    		Security update for dovecot23 (Important)
    2021-01-05
    oval:org.opensuse.security:def:69071
    P
    		Security update for dovecot23 (Important)
    2021-01-05
    oval:org.opensuse.security:def:96063
    P
    		Security update for dovecot23 (Important)
    2021-01-05
    oval:org.opensuse.security:def:10146
    P
    		Security update for dovecot23 (Important)
    2021-01-05
    oval:org.opensuse.security:def:105431
    P
    		Security update for dovecot23 (Important)
    2021-01-05
    oval:org.opensuse.security:def:97166
    P
    		Security update for dovecot23 (Important)
    2021-01-05
    oval:org.opensuse.security:def:69532
    P
    		Security update for dovecot23 (Important)
    2021-01-05
    oval:org.opensuse.security:def:98741
    P
    		Security update for dovecot23 (Important)
    2021-01-05
    oval:org.opensuse.security:def:109419
    P
    		Security update for dovecot23 (Important)
    2021-01-05
    oval:org.opensuse.security:def:97168
    P
    		Security update for dovecot23 (Important)
    2021-01-05
    oval:org.opensuse.security:def:118515
    P
    		Security update for dovecot23 (Important)
    2021-01-05
    oval:com.redhat.rhsa:def:20203713
    P
    		RHSA-2020:3713: dovecot security update (Important)
    2020-09-10
    oval:com.redhat.rhsa:def:20203617
    P
    		RHSA-2020:3617: dovecot security update (Important)
    2020-09-03
    BACK
    dovecot dovecot *
    debian debian linux 9.0
    debian debian linux 10.0
    fedoraproject fedora 31
    fedoraproject fedora 32
    fedoraproject fedora 33
    canonical ubuntu linux 18.04
    canonical ubuntu linux 14.04
    canonical ubuntu linux 20.04
    canonical ubuntu linux 16.04