Comment 13 for bug 1415087
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| Tristan Cacqueray (tristan-cacqueray) wrote Re: Format-guessing and file disclosure in image convert | #13 |
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0e1f616
(Get the code!)
@waldi: I couldn't find your affiliation, any company you want to be mentioned with this advisory ?
@nova-coresec: Can you check if other vulnerable image conversions exist (beside the snapshot upload) ?
Assuming this affects all cinder backend, here is impact description draft #1:
Title: Host file disclosure through qcow2 backing file
Reporter: Bastian Blank
Products: Cinder and Nova
Affects: up to 2014.1.3 and 2014.2 versions through 2014.2.2
Description:
Bastian Blank reported a vulnerability in Cinder and Nova. By creating a qcow2 image with an arbitrary backing file, an authenticated user may mislead Cinder upload-to-image action, resulting in disclosure of any file from the Cinder server. A similar vulnerability in Nova can also be used by an authenticated user to trick Nova during a snapshot upload, resulting in disclosure of any file for which the Nova process user has access to. All Cinder setups and all Nova setups with force_raw_image (which is set by default) are affected.