Security readout for executives and security teams
CVE-2020-7247 is a critical OpenSMTPD flaw that can let an unauthenticated remote attacker run commands as root through a crafted SMTP session. Business risk is highest where OpenSMTPD 6.6 or affected distribution packages are exposed to the internet. Likely exposure is internet-facing SMTP services running OpenSMTPD 6.6 or vulnerable downstream OpenSMTPD packages. OpenBSD 6.6 is specifically named; Debian, Ubuntu, and Fedora advisories indicate packaged exposure beyond OpenBSD. Immediate remediation is warranted for any exposed OpenSMTPD deployment. The vulnerability is remotely reachable, requires no authentication, can run as root, and is listed by CISA as known exploited. Mitigation focus: Apply vendor security updates for OpenSMTPD immediately.; Check OpenBSD, Debian, Ubuntu, and Fedora advisories for fixed package guidance.; Remove public SMTP exposure if patch status cannot be confirmed..
Michael Williams reviewed this cited source version on .
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Open ATT&CK lookupCVE-2020-7247 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
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CISA KEV status
CVSS vector scores
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CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.openbsd.org/security.htmlCVE reference · x_refsource_CONFIRM
- https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45CVE reference · x_refsource_CONFIRM
- 20200129 [SECURITY] [DSA 4611-1] opensmtpd security updateCVE reference · mailing-list, x_refsource_BUGTRAQ
- DSA-4611CVE reference · vendor-advisory, x_refsource_DEBIAN
- VU#390745CVE reference · third-party-advisory, x_refsource_CERT-VN
- USN-4268-1CVE reference · vendor-advisory, x_refsource_UBUNTU
- FEDORA-2020-b92d7083caCVE reference · vendor-advisory, x_refsource_FEDORA
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-7247CVE reference · government-resource
Products and packages named in the record
CWE details
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