Bug 1337079 (CVE-2016-4911)

Summary: CVE-2016-4911 openstack-keystone: Incorrect Audit IDs in Keystone Fernet Tokens can result in revocation bypass
Product: [Other] Security Response Reporter: Andrej Nemec <anemec>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED UPSTREAM QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: abaron, abhgupta, aileenc, aortega, apevec, apevec, ayoung, bfilippov, chazlett, chrisw, dmcphers, gmollett, itamar, jdennis, jialiu, jokerman, jonathansteffan, jose.castro.leon, jschluet, kseifried, lhh, lmeyer, lpeer, markmc, mmccomas, nkinder, rbryant, rduartes, sclewis, srevivo, tdecacqu, tiwillia
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Last Closed: 2016-08-11 23:15:19 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1337345, 1337346    
Bug Blocks: 1337081    
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Description Flags
mitaka patch none

Description Andrej Nemec 2016-05-18 08:59:40 UTC 
A vulnerability was found in the Keystone Fernet Token Provider. By rescoping a token a user will receive a new token without correct audit_ids, these incorrect audit_ids will prevent the entire chain of tokens from being revoked properly. This vulnerability does not impact revoking a token by it's individual audit_id. Only deployments with Keystone configured to use Fernet tokens are impacted.

References:

http://seclists.org/oss-sec/2016/q2/358
https://bugs.launchpad.net/keystone/+bug/1577558
Comment 2 Garth Mollett 2016-06-02 03:40:45 UTC 
Created attachment 1163873 [details]
mitaka patch