#VU26985 Improper Authentication in Cisco UCS Director and Cisco UCS Director Express for Big Data - CVE-2020-3243

Vulnerability identifier: #VU26985

Vulnerability risk: High

CVSSv4.0: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2020-3243

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Cisco UCS Director
Server applications / Other server solutions
Cisco UCS Director Express for Big Data
Server applications / Other server solutions

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to insufficient access control validation in the REST API. A remote attacker can send a specially crafted request, bypass authentication process and interact with the REST API with administrative privileges.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Cisco UCS Director: 6.0.0.0 - 6.7.3.0

Cisco UCS Director Express for Big Data: 3.7.3.0

---

External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucsd-mult-vulns-UNfpdW4E

---

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. However, a fully functional exploit for this vulnerability is available.