LabKey Server Community Edition <18.3.0 - Open Redirect

mediumseverity

6.1CVSS score

5%likelihood of exploitation, next 30 days

92%of all CVEs are less likely

Readycheck to confirm it

LabKey Server Community Edition before 18.3.0-61806.763 contains an open redirect vulnerability via the /__r1/ returnURL parameter, which allows an attacker to redirect a user to a malicious site and possibly obtain sensitive information, modify data, and/or execute unauthorized operations.

Impact

An attacker can exploit this vulnerability to redirect users to malicious websites, leading to phishing attacks or the theft of sensitive information.

Fix

Upgrade LabKey Server Community Edition to version 18.3.0 or later to mitigate the vulnerability.

How to confirm it

Send: GET {{BaseURL}}/labkey/__r1/login-login.view?returnUrl=http://interact.sh
Positive when: matches in header /(?m)^(?:Location\s*?:\s*?)(?:https?:\/\/|\/\/|\/\\\\|\/\\)(?:[a-zA-Z0-9\-_\.@]*…/

Run it with nuclei: nuclei -id CVE-2019-3912 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2019-3912

info:
  name: LabKey Server Community Edition <18.3.0 - Open Redirect
  author: 0x_Akoko
  severity: medium
  description: LabKey Server Community Edition before 18.3.0-61806.763 contains an open redirect vulnerability via the /__r1/ returnURL parameter, which allows an attacker to redirect a user to a malicious site and possibly obtain sensitive information, modify data, and/or execute unauthorized operations.
  impact: |
    An attacker can exploit this vulnerability to redirect users to malicious websites, leading to phishing attacks or the theft of sensitive information.
  remediation: |
    Upgrade LabKey Server Community Edition to version 18.3.0 or later to mitigate the vulnerability.
  reference:
    - https://www.tenable.com/security/research/tra-2019-03
    - https://nvd.nist.gov/vuln/detail/CVE-2019-3912
    - https://github.com/ARPSyndicate/kenzer-templates
    - https://github.com/StarCrossPortal/scalpel
    - https://github.com/anonymous364872/Rapier_Tool
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2019-3912
    cwe-id: CWE-601
    epss-score: 0.04966
    epss-percentile: 0.9226
    cpe: cpe:2.3:a:labkey:labkey_server:*:*:*:*:community:*:*:*
  metadata:
    max-request: 1
    vendor: labkey
    product: labkey_server
    shodan-query:
      - 'Server: Labkey'
      - 'http.title:"sign in: /home"'
      - "server: labkey"
    fofa-query: 'title="sign in: /home"'
    google-query: 'intitle:"sign in: /home"'
  tags: cve2019,cve,tenable,redirect,labkey,vuln

http:
  - method: GET
    path:
      - '{{BaseURL}}/labkey/__r1/login-login.view?returnUrl=http://interact.sh'

    matchers:
      - type: regex
        part: header
        regex:
          - '(?m)^(?:Location\s*?:\s*?)(?:https?:\/\/|\/\/|\/\\\\|\/\\)(?:[a-zA-Z0-9\-_\.@]*)interact\.sh\/?(\/|[^.].*)?$' # https://regex101.com/r/L403F0/1

References

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