Auth bypass in Redhat Ansible Tower
CVE-2020-10697
A flaw was found in Ansible Tower when running Openshift. Tower runs a memcached, which is accessed via TCP. An attacker can take advantage of writing a playbook polluting this cache, causing a denial of service attack. This attack would not completely stop the service, but in the worst-case scenario, it can reduce the Tower performance, for which memcached is designed. Theoretically, more sophisticated attacks can be performed by manipulating and crafting the cache, as Tower relies on memcached as a place to pull out setting values. Confidential and sensitive data stored in memcached should not be pulled, as this information is encrypted. This flaw affects Ansible Tower versions before 3.6.4, Ansible Tower versions before 3.5.6 and Ansible Tower versions before 3.4.6.
Vulnerability class: Broken Access Control
EPSS: 0.002 (15.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L.
Affected products
- Redhat Ansible_tower
- N/a Tower — versions ansible_tower 3.6.4, ansible_tower 3.5.6, ansible_tower 3.4.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (x_refsource_MISC, Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-10697?
- CVE-2020-10697 is a medium-severity vulnerability in Redhat Ansible Tower, classified under Missing Authorization. CVSS score: 4.4/10. Published 2021-05-27.
- How severe is CVE-2020-10697?
- Medium severity. CVSS v3 base score is 4.4 out of 10.
- Is CVE-2020-10697 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.