Vulnerability identifier: #VU20379

Vulnerability risk: High

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-12634

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco UCS Director Express for Big Data
Server applications / Other server solutions
Cisco UCS Director
Server applications / Other server solutions
Cisco Integrated Management Controller Supervisor
Web applications / Remote management & hosting panels

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to cause a denial of service (DoS) condition.

The vulnerability exists due to a missing authentication check in an API call in the web-based management interface. A remote attacker can send a specially crafted request and cause all currently authenticated users to be logged off. Repeated exploitation could cause the inability to maintain a session in the web-based management portal.  

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco UCS Director Express for Big Data: 3.6.0.0 - 3.7.2.0

Cisco UCS Director: 6.6.0.0 - 6.7.2.0

Cisco Integrated Management Controller Supervisor: 2.2.0.3 - 2.2.0.6

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190821-ucs-imc-dos

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.