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URL: https://nvd.nist.gov/vuln/detail/CVE-2020-7247

⇱ NVD - CVE-2020-7247

  1. Vulnerabilities

CVE-2020-7247 Detail

Description

smtp_mailaddr in smtp_session.c in OpenSMTPD 6.6, as used in OpenBSD 6.6 and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session, as demonstrated by shell metacharacters in a MAIL FROM field. This affects the "uncommented" default configuration. The issue exists because of an incorrect return value upon failure of input validation.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html CVE, MITRE Exploit  Third Party Advisory  VDB Entry 
http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html CVE, MITRE Exploit  Third Party Advisory  VDB Entry 
http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html CVE, MITRE Exploit  Third Party Advisory  VDB Entry 
http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html CVE, MITRE Exploit  Third Party Advisory  VDB Entry 
http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html CVE, MITRE Broken Link  Third Party Advisory  VDB Entry 
http://seclists.org/fulldisclosure/2020/Jan/49 CVE, MITRE Exploit  Mailing List  Third Party Advisory 
http://www.openwall.com/lists/oss-security/2020/01/28/3 CVE, MITRE Exploit  Mailing List  Third Party Advisory 
https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45 CVE, MITRE Patch 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ CVE, MITRE Mailing List  Third Party Advisory 
https://seclists.org/bugtraq/2020/Jan/51 CVE, MITRE Mailing List  Third Party Advisory 
https://usn.ubuntu.com/4268-1/ CVE, MITRE Third Party Advisory 
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-7247 CISA-ADP US Government Resource 
https://www.debian.org/security/2020/dsa-4611 CVE, MITRE Mailing List  Third Party Advisory 
https://www.kb.cert.org/vuls/id/390745 CVE, MITRE Third Party Advisory  US Government Resource 
https://www.openbsd.org/security.html CVE, MITRE Patch  Vendor Advisory 

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability Name Date Added Due Date Required Action
OpenSMTPD Remote Code Execution Vulnerability 03/25/2022 04/15/2022 Apply updates per vendor instructions.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') 👁 cwe source acceptance level
NIST  
CWE-755 Improper Handling of Exceptional Conditions 👁 cwe source acceptance level
NIST   CISA-ADP  

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

26 change records found show changes

CVE Modified by CISA-ADP 6/16/2026 11:24:35 PM

Action Type Old Value New Value
Added SSVC 
{"timestamp":"2025-02-04T20:20:39.836897Z","id":"CVE-2020-7247","options":[{"exploitation":"active"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}

CVE Modified by MITRE 6/16/2026 11:24:35 PM

Action Type Old Value New Value
Added Affected 
[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}]

Modified Analysis by NIST 11/07/2025 5:02:55 PM

Action Type Old Value New Value
Added Reference Type 
CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-7247 Types: US Government Resource

CVE Modified by CISA-ADP 10/21/2025 8:17:11 PM

Action Type Old Value New Value
Added Reference 
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-7247

CVE Modified by CISA-ADP 10/21/2025 4:18:07 PM

Action Type Old Value New Value
Removed Reference 
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-7247

CVE Modified by CISA-ADP 10/21/2025 3:18:38 PM

Action Type Old Value New Value
Added Reference 
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-7247

Modified Analysis by NIST 4/03/2025 3:43:07 PM

Action Type Old Value New Value

CVE Modified by CISA-ADP 2/04/2025 4:15:20 PM

Action Type Old Value New Value
Added CVSS V3.1 
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added CWE 
CWE-755

CVE Modified by CVE 11/21/2024 12:36:55 AM

Action Type Old Value New Value
Added Reference 
http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html
Added Reference 
http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html
Added Reference 
http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html
Added Reference 
http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html
Added Reference 
http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html
Added Reference 
http://seclists.org/fulldisclosure/2020/Jan/49
Added Reference 
http://www.openwall.com/lists/oss-security/2020/01/28/3
Added Reference 
https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45
Added Reference 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/
Added Reference 
https://seclists.org/bugtraq/2020/Jan/51
Added Reference 
https://usn.ubuntu.com/4268-1/
Added Reference 
https://www.debian.org/security/2020/dsa-4611
Added Reference 
https://www.kb.cert.org/vuls/id/390745
Added Reference 
https://www.openbsd.org/security.html

Modified Analysis by NIST 7/16/2024 1:40:26 PM

Action Type Old Value New Value
Changed Reference Type 
http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html Third Party Advisory, VDB Entry


 
http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry
Changed Reference Type 
http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html Broken Link


 
http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html Broken Link, Third Party Advisory, VDB Entry
Changed Reference Type 
http://seclists.org/fulldisclosure/2020/Jan/49 Mailing List, Third Party Advisory


 
http://seclists.org/fulldisclosure/2020/Jan/49 Exploit, Mailing List, Third Party Advisory
Changed Reference Type 
https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45 Patch, Third Party Advisory


 
https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45 Patch
Changed Reference Type 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ No Types Assigned


 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ Mailing List, Third Party Advisory
Changed Reference Type 
https://www.debian.org/security/2020/dsa-4611 Third Party Advisory


 
https://www.debian.org/security/2020/dsa-4611 Mailing List, Third Party Advisory

CVE Modified by MITRE 5/14/2024 3:36:22 AM

Action Type Old Value New Value

CVE Modified by MITRE 11/06/2023 10:25:43 PM

Action Type Old Value New Value
Added Reference 
MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ [No types assigned]
Removed Reference 
MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/

Modified Analysis by NIST 4/29/2022 9:24:05 AM

Action Type Old Value New Value
Added CPE Configuration 
OR
 *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
 *cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
Added CPE Configuration 
OR
 *cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
Changed Reference Type 
http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html Third Party Advisory


 
http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html Third Party Advisory, VDB Entry
Changed Reference Type 
http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html No Types Assigned


 
http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry
Changed Reference Type 
http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html No Types Assigned


 
http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html Exploit, Third Party Advisory, VDB Entry
Changed Reference Type 
http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html No Types Assigned


 
http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html Broken Link
Changed Reference Type 
http://seclists.org/fulldisclosure/2020/Jan/49 No Types Assigned


 
http://seclists.org/fulldisclosure/2020/Jan/49 Mailing List, Third Party Advisory
Changed Reference Type 
https://lists.fedoraproject.org/archives/list/[email protected]/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ No Types Assigned


 
https://lists.fedoraproject.org/archives/list/[email protected]/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ Mailing List, Third Party Advisory
Changed Reference Type 
https://seclists.org/bugtraq/2020/Jan/51 Third Party Advisory


 
https://seclists.org/bugtraq/2020/Jan/51 Mailing List, Third Party Advisory
Changed Reference Type 
https://usn.ubuntu.com/4268-1/ No Types Assigned


 
https://usn.ubuntu.com/4268-1/ Third Party Advisory
Changed Reference Type 
https://www.kb.cert.org/vuls/id/390745 No Types Assigned


 
https://www.kb.cert.org/vuls/id/390745 Third Party Advisory, US Government Resource

CWE Remap by NIST 7/21/2021 7:39:23 AM

Action Type Old Value New Value
Changed CWE 
CWE-252



CWE-755
CWE-78


CVE Modified by MITRE 4/06/2021 12:15:16 PM

Action Type Old Value New Value
Added Reference 
http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html [No Types Assigned]

CVE Modified by MITRE 3/16/2020 8:15:12 PM

Action Type Old Value New Value
Added Reference 
https://lists.fedoraproject.org/archives/list/[email protected]/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ [No Types Assigned]

CVE Modified by MITRE 2/11/2020 4:15:11 PM

Action Type Old Value New Value
Added Reference 
https://usn.ubuntu.com/4268-1/ [No Types Assigned]

CVE Modified by MITRE 2/11/2020 1:15:17 PM

Action Type Old Value New Value
Added Reference 
http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html [No Types Assigned]

CVE Modified by MITRE 2/07/2020 1:15:11 PM

Action Type Old Value New Value
Added Reference 
http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html [No Types Assigned]

CVE Modified by MITRE 2/01/2020 5:15:09 AM

Action Type Old Value New Value
Added Reference 
http://seclists.org/fulldisclosure/2020/Jan/49 [No Types Assigned]

CVE Modified by MITRE 1/31/2020 6:15:10 PM

Action Type Old Value New Value
Added Reference 
https://www.kb.cert.org/vuls/id/390745 [No Types Assigned]

Initial Analysis by NIST 1/31/2020 9:43:52 AM

Action Type Old Value New Value
Added CVSS V3.1 
NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added CVSS V2 
NIST (AV:N/AC:L/Au:N/C:C/I:C/A:C)
Added CWE 
NIST CWE-252
Added CPE Configuration 
OR
 *cpe:2.3:a:openbsd:opensmtpd:6.6:*:*:*:*:*:*:*
Added CPE Configuration 
OR
 *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
 *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Changed Reference Type 
http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html No Types Assigned


 
http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html Exploit, Third Party Advisory, VDB Entry
Changed Reference Type 
http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html No Types Assigned


 
http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html Third Party Advisory
Changed Reference Type 
http://www.openwall.com/lists/oss-security/2020/01/28/3 No Types Assigned


 
http://www.openwall.com/lists/oss-security/2020/01/28/3 Exploit, Mailing List, Third Party Advisory
Changed Reference Type 
https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45 No Types Assigned


 
https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45 Patch, Third Party Advisory
Changed Reference Type 
https://seclists.org/bugtraq/2020/Jan/51 No Types Assigned


 
https://seclists.org/bugtraq/2020/Jan/51 Third Party Advisory
Changed Reference Type 
https://www.debian.org/security/2020/dsa-4611 No Types Assigned


 
https://www.debian.org/security/2020/dsa-4611 Third Party Advisory
Changed Reference Type 
https://www.openbsd.org/security.html No Types Assigned


 
https://www.openbsd.org/security.html Patch, Vendor Advisory

CVE Modified by MITRE 1/30/2020 1:15:11 PM

Action Type Old Value New Value
Added Reference 
http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html [No Types Assigned]

CVE Modified by MITRE 1/30/2020 7:15:11 AM

Action Type Old Value New Value
Added Reference 
https://www.debian.org/security/2020/dsa-4611 [No Types Assigned]

CVE Modified by MITRE 1/30/2020 4:15:10 AM

Action Type Old Value New Value
Added Reference 
https://seclists.org/bugtraq/2020/Jan/51 [No Types Assigned]

CVE Modified by MITRE 1/29/2020 2:15:14 PM

Action Type Old Value New Value
Added Reference 
http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html [No Types Assigned]

Quick Info

CVE Dictionary Entry:
CVE-2020-7247
NVD Published Date:
01/29/2020
NVD Last Modified:
06/16/2026
Source:
MITRE