CVE-2018-0238 Auth bypass in Cisco UCS Director

What is CVE-2018-0238?

CVE-2018-0238 is a critical authentication bypass vulnerability in Cisco UCS Director, published on 19 Apr 2018. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability in the role-based resource checking functionality of the Cisco Unified Computing System (UCS) Director could allow an authenticated, remote attacker to view unauthorized information for any virtual machine in the UCS Director end-user portal and perform any permitted operations on any virtual machine. The permitted operations can be configured for the end user on the virtual machines with either of the following settings: The virtual machine is associated to a Virtual Data Center (VDC) that has an end user self-service policy attached to the VDC. The end user role has VM Management Actions settings configured under User Permissions. This is a global configuration, so all the virtual machines visible in the end-user portal will have the VM management actions available. The vulnerability is due to improper user authentication checks. An attacker could exploit this vulnerability by logging in to the UCS Director with a modified username and valid password. A successful exploit could allow the attacker to gain visibility into and perform actions against all virtual machines in the UCS Director end-user portal of the affected system. This vulnerability affects Cisco Unified Computing System (UCS) Director releases 6.0 and 6.5 prior to patch 3 that are in a default configuration. Cisco Bug IDs: CSCvh53501.

Weakness: CWE-287

Which versions are affected by CVE-2018-0238?

It affects 1 product.

Products include Cisco Unified Computing System Director.

How do I fix CVE-2018-0238?

No fix has been published for CVE-2018-0238 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2018-0238 being exploited?

There is no known exploitation of CVE-2018-0238 in the wild and no public exploit code.

Other vulnerabilities in Cisco UCS Director

• CVE-2017-3801 Privilege escalation in Cisco UCS Director versions 6.0.0.0 and 6.0.0.1 High 8.8
• CVE-2018-0219 Cross-site scripting in Cisco UCS Director Medium 6.1
• CVE-2017-3868 Cross-site scripting in Cisco UCS Director Medium 6.1
• CVE-2017-3817 Missing authorization in Cisco UCS Director Medium 4.3

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-jr59-qj3r-wcp8.