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AUSCERT External Security Bulletin Redistribution
ESB-2020.3003
USN-4480-1: OpenStack Keystone vulnerabilities
2 September 2020
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AusCERT Security Bulletin Summary
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Product: openstack keystone
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Increased Privileges -- Existing Account
Unauthorised Access -- Existing Account
Reduced Security -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-12692 CVE-2020-12691 CVE-2020-12690
CVE-2020-12689
Reference: ESB-2020.2524
ESB-2020.2519
ESB-2020.2196
Original Bulletin:
https://usn.ubuntu.com/4480-1/
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USN-4480-1: OpenStack Keystone vulnerabilities
01 September 2020
Several security issues were fixed in OpenStack Keystone.
Releases
o Ubuntu 18.04 LTS
Packages
o keystone - OpenStack identity service
Details
It was discovered that OpenStack Keystone incorrectly handled EC2
credentials. An authenticated attacker with a limited scope could possibly
create EC2 credentials with escalated permissions. (CVE-2020-12689,
CVE-2020-12691)
It was discovered that OpenStack Keystone incorrectly handled the list of
roles provided with OAuth1 access tokens. An authenticated user could
possibly end up with more role assignments than intended. (CVE-2020-12690)
It was discovered that OpenStack Keystone incorrectly handled EC2 signature
TTL checks. A remote attacker could possibly use this issue to reuse
Authorization headers. (CVE-2020-12692)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 18.04
o keystone - 2:13.0.4-0ubuntu1
o python-keystone - 2:13.0.4-0ubuntu1
In general, a standard system update will make all the necessary changes.
References
o CVE-2020-12689
o CVE-2020-12690
o CVE-2020-12691
o CVE-2020-12692
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