CVE-2016-4911

Description

The Fernet Token Provider in OpenStack Identity (Keystone) 9.0.x before 9.0.1 (mitaka) allows remote authenticated users to prevent revocation of a chain of tokens and bypass intended access restrictions by rescoping a token.

Category

4.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.21%
Vendor Advisory launchpad.net Vendor Advisory openstack.org Vendor Advisory openstack.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugs.launchpad.net/keystone/+bug/1577558 vendor advisory
http://www.openwall.com/lists/oss-security/2016/05/17/10 mailing list
http://www.securityfocus.com/bid/90728 third party advisory vdb entry
https://security.openstack.org/ossa/OSSA-2016-008.html patch vendor advisory
https://review.openstack.org/#/c/311886/ vendor advisory
http://www.openwall.com/lists/oss-security/2016/05/17/11 mailing list

Frequently Asked Questions

What is the severity of CVE-2016-4911?
CVE-2016-4911 has been scored as a medium severity vulnerability.
How to fix CVE-2016-4911?
To fix CVE-2016-4911, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-4911 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2016-4911 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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