OpenBSD · OpenSMTPD
CVE-2020-7247
OpenSMTPD Remote Code Execution Vulnerability
Cos'è
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.
CISA: smtp_mailaddr in smtp_session.c in OpenSMTPD, as used in OpenBSD and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session.
Cosa fare
Apply updates per vendor instructions.
Scadenza per le agenzie federali USA: 15 aprile 2022
- Aggiunta all'elenco CISA
- 25 marzo 2022
- Pubblicato
- 29 gennaio 2020
- Gravità
- Critica 9,8 CVSS 3.1
- Probabilità di attacchi nei prossimi 30 giorni (EPSS)
- 99% tra il 0,1% più alto di tutte le vulnerabilità note
- Tipo di debolezza
- CWE-755 CWE-78
- Più dettagli
- NVD · CVE.org · CISA
Tutte le fonti (14)
- https://www.debian.org/security/2020/dsa-4611
- https://usn.ubuntu.com/4268-1/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA…
- https://www.openbsd.org/security.html
- http://www.openwall.com/lists/oss-security/2020/01/28/3
- https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45
- http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html
- https://seclists.org/bugtraq/2020/Jan/51
- http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html
- https://www.kb.cert.org/vuls/id/390745
- http://seclists.org/fulldisclosure/2020/Jan/49
- http://packetstormsecurity.com/files/156249/OpenSMTPD-MAIL-FROM-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/156295/OpenSMTPD-6.6.1-Local-Privilege-Escalation.html
- http://packetstormsecurity.com/files/162093/OpenBSD-OpenSMTPD-6.6-Remote-Code-Execution.html
Fonti: Known Exploited Vulnerabilities (CISA, pubblico dominio), CVE records (cve.org) e EPSS (FIRST). La probabilità di attacco è la stima EPSS che qualcuno provi a sfruttare la falla nei prossimi 30 giorni.