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CloudFlare (cPanel) - Local Privilege Escalation Vulnerability (R911-0081)
| Posted by Steven, 10-23-2013, 11:11 AM |
| Product Description:
CloudFlare protects and accelerates any website online. Once your website is a part of the CloudFlare community, its web traffic is routed through our intelligent global network. We automatically optimize the delivery of your web pages so your visitors get the fastest page load times and best performance. We also block threats and limit abusive bots and crawlers from wasting your bandwidth and server resources. The result: CloudFlare-powered websites see a significant improvement in performance and a decrease in spam and other attacks.
Vulnerability Description:
There is a local privilege escalation flaw in CloudFlare's cPanel Plugin that would allow an attacker to write to any file on the server leading to a root compromise.
Proof of Concept:
Due to the nature of this security flaw, we will not be posting a Proof of Concept until a much later date.
Impact:
We have deemed this vulnerability to be rated as CRITICAL due to the fact that root access can be obtained.
Vulnerable Version:
This vulnerability was tested against CloudFlare (cPanel Plugin) v4.2 and is believed to exist in all prior versions.
Fixed Version:
This vulnerability was patched CloudFlare (cPanel Plugin) v4.5.
Vendor Contact Timeline:
2013-10-18: Vendor contacted via email.
2013-10-18: Vendor confirms vulnerability.
2013-10-21: Vendor issues updates to all builds.
2013-10-22: Rack911 issues security advisory.
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| Posted by Patrick, 10-23-2013, 11:15 AM |
| You can confirm that you are using the latest version via:
cat /usr/local/cpanel/etc/cloudflare.json | grep cp_version
If it doesn't return 4.5 then you can try manually updating:
/usr/local/cpanel/bin/cloudflare_update.sh
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| Posted by Steven, 10-23-2013, 11:18 AM |
| Note.. older versions did not have this update script so you may need to reinstall from github.
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| Posted by ServerZoo, 10-23-2013, 11:33 AM |
| thanks for this info as we just had to reinstall like you said
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| Posted by Patrick, 10-23-2013, 11:39 AM |
| Re-install instructions, if auto update doesn't work:
When you initially signed up for CloudFlare they gave you a key. You need to replace that with your key, otherwise the software will not work properly. After you have re-installed the software, check the .json file again to ensure it says 4.5 or later.
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