by Kastro
Paper/Archive/CVE-2020-7247

CVE-2020-7247

OpenBSD OpenSMTPD — OpenSMTPD Remote Code Execution Vulnerability

KEV · due 15 AprEPSS 99%public exploitSSVC actCVSS 9.8
critical.is priorityof 100
99
CVSS 9.8 (ADP)9.8 / 10 × 3029.4In CISA KEV+3030.0EPSS percentile 99.9.999 × 2020.0Exploit: SSVC active+1010.0SSVC exploitation: active+1010.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
n/an/a–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: active · Automatable: yes · Technical impact: total

References

refopenbsd.org/security.htmlrefopenwall.com/lists/oss-security/2020/01/28/3refgithub.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45refpacketstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.htmlrefseclists.org/bugtraq/2020/Jan/51advisorydebian.org/security/2020/dsa-4611refpacketstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.htmlwriteupkb.cert.org/vuls/id/390745refseclists.org/fulldisclosure/2020/Jan/49refpacketstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.htmlrefpacketstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.htmladvisoryusn.ubuntu.com/4268-1advisorylists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4Erefpacketstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.htmlrefcisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-7247kevcisa.gov/known-exploited-vulnerabilities-catalog