CVE-2020-12692
MEDIUMCVSS 5.4/10EPSS 0.70%
Last modified
CVE-2020-12692 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0. The EC2 API doesn't have a signature TTL check for AWS Signature V4. EPSS estimates a 0.70% chance of exploitation in the next 30 days.
Description
An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0. The EC2 API doesn't have a signature TTL check for AWS Signature V4. An attacker can sniff the Authorization header, and then use it to reissue an OpenStack token an unlimited number of times.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Openstack | Keystone | < 15.0.1 |
| Openstack | Keystone | 16.0.0 |
| Canonical | Ubuntu Linux | 18.04 |
References
- http://www.openwall.com/lists/oss-security/2020/05/07/1Mailing List, Third Party Advisory
- https://bugs.launchpad.net/keystone/+bug/1872737Third Party Advisory
- https://security.openstack.org/ossa/OSSA-2020-003.htmlVendor Advisory
- https://usn.ubuntu.com/4480-1/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2020/05/06/4Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/05/07/1Mailing List, Third Party Advisory
- https://bugs.launchpad.net/keystone/+bug/1872737Third Party Advisory
- https://security.openstack.org/ossa/OSSA-2020-003.htmlVendor Advisory
- https://usn.ubuntu.com/4480-1/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2020/05/06/4Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-12692?
An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0. The EC2 API doesn't have a signature TTL check for AWS Signature V4. An attacker can sniff the Authorization header, and then use it to reissue an OpenStack token an unlimited number of times.
How severe is CVE-2020-12692?
CVE-2020-12692 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.70% probability of exploitation in the next 30 days.
How do I fix CVE-2020-12692?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2020-12692?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST