Auth bypass in Cisco Unified Computing System Director
CVE-2019-1937
A vulnerability in the web-based management interface of Cisco Integrated Management Controller (IMC) Supervisor, Cisco UCS Director, and Cisco UCS Director Express for Big Data could allow an unauthenticated, remote attacker to acquire a valid session token with administrator privileges, bypassing user authentication. The vulnerability is due to insufficient request header validation during the authentication process. An attacker could exploit this vulnerability by sending a series of malicious requests to an affected device. An exploit could allow the attacker to use the acquired session token to gain full administrator access to the affected device.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.759 (99.5th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.759 · newest: 0.759 · change: 0.000
Affected products
- Cisco Unified Computing System Director — versions unspecified
- Cisco Integrated Management Controller Supervisor
- Cisco Ucs Director — versions 6.7(0.0.67265), 6.7\(0.0.67265\)
- Cisco Ucs Director Express For Big Data — versions 3.6.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190821… (vendor-advisory, Vendor Advisory)
- seclists.org/bugtraq/2019/Aug/49 (mailing-list, Third Party Advisory)
- packetstormsecurity.com/files/154239/Cisco-UCS-IMC-Supervisor-Authentication-By… (Exploit, Third Party Advisory)
- seclists.org/fulldisclosure/2019/Aug/36 (mailing-list)
- packetstormsecurity.com/files/154308/Cisco-UCS-Director-Unauthenticated-Remote-…
- packetstormsecurity.com/files/173531/Cisco-UCS-IMC-Supervisor-2.2.0.0-Authentic…
Frequently asked questions
- What is CVE-2019-1937?
- CVE-2019-1937 is a critical-severity vulnerability in Cisco Unified Computing System Director, classified under Improper Authentication. CVSS score: 9.8/10. Published 2019-08-21.
- How severe is CVE-2019-1937?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2019-1937 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.