Kaseya Virtual System Administrator - Open Redirect

mediumseverity

4.3CVSS score

10.2%likelihood of exploitation, next 30 days

96%of all CVEs are less likely

Readycheck to confirm it

Kaseya Virtual System Administrator 7.x before 7.0.0.29, 8.x before 8.0.0.18, 9.0 before 9.0.0.14, and 9.1 before 9.1.0.4 are susceptible to an open redirect vulnerability. An attacker can redirect users to arbitrary web sites and conduct phishing attacks via unspecified vectors.

Impact

Attackers can redirect users to malicious sites, facilitating phishing attacks and potential credential theft.

Fix

Update to version 7.0.0.29, 8.0.0.18, 9.0.0.14, or 9.1.0.4 or later.

How to confirm it

Send: GET {{BaseURL}}/inc/supportLoad.asp?urlToLoad=http://oast.me ; GET {{BaseURL}}/vsaPres/Web20/core/LocalProxy.ashx?url=http://oast.me
Positive when: matches in header /(?m)^(?:Location\s*?:\s*?)(?:https?:\/\/|\/\/|\/\\\\|\/\\)(?:[a-zA-Z0-9\-_\.@]*…/

Run it with nuclei: nuclei -id CVE-2015-2863 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2015-2863

info:
  name: Kaseya Virtual System Administrator - Open Redirect
  author: 0x_Akoko,AmirHossein Raeisi
  severity: medium
  description: |
    Kaseya Virtual System Administrator 7.x before 7.0.0.29, 8.x before 8.0.0.18, 9.0 before 9.0.0.14, and 9.1 before 9.1.0.4 are susceptible to an open redirect vulnerability. An attacker can redirect users to arbitrary web sites and conduct phishing attacks via unspecified vectors.
  impact: |
    Attackers can redirect users to malicious sites, facilitating phishing attacks and potential credential theft.
  remediation: |
    Update to version 7.0.0.29, 8.0.0.18, 9.0.0.14, or 9.1.0.4 or later.
  reference:
    - https://github.com/pedrib/PoC/blob/3f927b957b86a91ce65b017c4b9c93d05e241592/advisories/Kaseya/kaseya-vsa-vuln.txt
    - http://www.kb.cert.org/vuls/id/919604
    - https://nvd.nist.gov/vuln/detail/CVE-2015-2863
    - https://github.com/ARPSyndicate/kenzer-templates
    - https://github.com/ARPSyndicate/cvemon
  classification:
    cvss-metrics: CVSS:2.0/AV:N/AC:M/Au:N/C:N/I:P/A:N
    cvss-score: 4.3
    cve-id: CVE-2015-2863
    cwe-id: CWE-601
    epss-score: 0.10246
    epss-percentile: 0.9572
    cpe: cpe:2.3:a:kaseya:virtual_system_administrator:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: kaseya
    product: virtual_system_administrator
  tags: cve2015,cve,redirect,kaseya,vkev,vuln

http:
  - method: GET
    path:
      - '{{BaseURL}}/inc/supportLoad.asp?urlToLoad=http://oast.me'
      - '{{BaseURL}}/vsaPres/Web20/core/LocalProxy.ashx?url=http://oast.me'

    stop-at-first-match: true
    matchers:
      - type: regex
        part: header
        regex:
          - '(?m)^(?:Location\s*?:\s*?)(?:https?:\/\/|\/\/|\/\\\\|\/\\)(?:[a-zA-Z0-9\-_\.@]*)oast\.me\/?(\/|[^.].*)?$' # https://regex101.com/r/idfD2e/1

References

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