CVE-2015-7546

Publication date 3 February 2016

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

The identity service in OpenStack Identity (Keystone) before 2015.1.3 (Kilo) and 8.0.x before 8.0.2 (Liberty) and keystonemiddleware (formerly python-keystoneclient) before 1.5.4 (Kilo) and Liberty before 2.3.3 does not properly invalidate authorization tokens when using the PKI or PKIZ token providers, which allows remote authenticated users to bypass intended access restrictions and gain access to cloud resources by manipulating byte fields within a revoked token.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
keystone	17.04 zesty	Not affected
	16.10 yakkety	Not affected
	16.04 LTS xenial	Not affected
	15.10 wily	Not affected
	15.04 vivid	Ignored
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Ignored
python-keystonemiddleware	17.04 zesty	Not affected
	16.10 yakkety	Not affected
	16.04 LTS xenial	Not affected
	15.10 wily	Ignored
	15.04 vivid	Ignored
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release

Notes

mdeslaur

we will not be fixing this in Ubuntu 14.04 LTS. Users are encouraged to migrate to a different token provider as described in the upstream advisory.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
keystone	Upstream: https://review.openstack.org/#/c/258141/
python-keystonemiddleware	Upstream: https://review.openstack.org/#/c/258143/

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H