Unchecked Return Value The advisory has been revoked - it doesn't affect any version of package opensmtpd (opens in a new tab)
Threat Intelligence
Snyk has reported that there have been attempts or successful attacks targeting this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU2004-OPENSMTPD-634839
- published29 Jan 2020
- disclosed29 Jan 2020
Introduced: 29 Jan 2020
CVE-2020-7247 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:20.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream opensmtpd package and not the opensmtpd package as distributed by Ubuntu.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2020-7247
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-7247
- https://seclists.org/bugtraq/2020/Jan/51
- https://www.kb.cert.org/vuls/id/390745
- https://www.openbsd.org/security.html
- https://www.debian.org/security/2020/dsa-4611
- https://security-tracker.debian.org/tracker/CVE-2020-7247
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/
- https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45
- http://packetstormsecurity.com/files/156137/OpenBSD-OpenSMTPD-Privilege-Escalation-Code-Execution.html
- http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html
- 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
- http://www.openwall.com/lists/oss-security/2020/01/28/3
- http://seclists.org/fulldisclosure/2020/Jan/49
- https://usn.ubuntu.com/4268-1/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-7247
- https://www.exploit-db.com/exploits/48051
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- https://github.com/projectdiscovery/nuclei-templates/blob/main/javascript/cves/2020/CVE-2020-7247.yaml
- https://github.com/QTranspose/CVE-2020-7247-exploit