9.8Kritisch KEV

CVE-2020-7247OpenSMTPD Remote Code Execution Vulnerability

openbsd opensmtpd; debian debian linux; fedoraproject fedora; canonical ubuntu linux Veröffentlicht: 2020-01-29 18:53 (vor 6 Jahren)

Bekannt ausgenutzt — OpenSMTPD Remote Code Execution Vulnerability

CISA hat am 25.03.2022 bestätigt, dass diese Schwachstelle in echten Angriffen genutzt wird. Frist für US-Bundesbehörden: 15.04.2022.

Erforderliche Maßnahme: Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2020-7247

Beschreibung

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.

Schwachstellentyp (CWE): CWE-755 CWE-78

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

Hersteller	Produkt	Versionen
canonical	ubuntu linux	18.04
debian	debian linux	9.0
fedoraproject	fedora	32
openbsd	opensmtpd	6.6

Referenzen und Patches

https://www.openbsd.org/security.html PatchVendor Advisory
http://www.openwall.com/lists/oss-security/2020/01/28/3 ExploitMailing ListThird Party Advisory
https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45 Patch
http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html ExploitThird Party AdvisoryVDB Entry
20200129 [SECURITY] [DSA 4611-1] opensmtpd security update mailing-listMailing ListThird Party Advisory
DSA-4611 vendor-advisoryMailing ListThird Party Advisory
http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html ExploitThird Party AdvisoryVDB Entry
VU#390745 third-party-advisoryThird Party AdvisoryUS Government Resource
20200131 LPE and RCE in OpenSMTPD (CVE-2020-7247) mailing-listExploitMailing ListThird Party Advisory
http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html ExploitThird Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html ExploitThird Party AdvisoryVDB Entry
USN-4268-1 vendor-advisoryThird Party Advisory
FEDORA-2020-b92d7083ca vendor-advisoryMailing ListThird Party Advisory
http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html Broken LinkThird Party AdvisoryVDB Entry
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-7247 US Government Resource

CPE-Treffer (NVD) (6)

cpe:2.3:a:openbsd:opensmtpd:6.6:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*

CVSS-Score

9.8Kritisch

Quelle: CISA-ADP · CVSS 3.1

Angriffsvektor: Netzwerk
Komplexität: Niedrig
Rechte erforderlich: Keine
Benutzerinteraktion: Keine
Geltungsbereich: Unverändert
Vertraulichkeit: Hoch
Integrität: Hoch
Verfügbarkeit: Hoch

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Alle Scores (4)

CISA-ADP	CVSS 3.1	9.8Kritisch
nvd	CVSS 3.1	9.8Kritisch
134c704f-9b21-4f2e-91b3-4a467353bcc0	CVSS 3.1	9.8Kritisch
nvd	CVSS 2.0	10.0Hoch

EPSS (Ausnutzungswahrscheinlichkeit in 30 Tagen)

98.97%

höher als 100 % aller CVEs

CISA-Bewertung (SSVC)

Ausnutzung: active
Automatisierbar: yes
Technische Auswirkung: total

Zeitverlauf

ID reserviert2020-01-20
Veröffentlicht2020-01-29 18:53
Bei IP-DB eingegangen2026-10-24 23:33
In KEV aufgenommen2022-03-25
Zuletzt aktualisiert2026-06-17 06:24

Vergeben von (CNA): mitre
NVD-Status: Analyzed

In der Quelle ansehen: CVE.org · NVD

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