Denial of service in Cisco UCS Manager Software

1) Resource management error

EUVDB-ID: #VU56099

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-1592

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources for established SSH sessions. A remote user can open a significant number of SSH sessions on an affected device and perform a denial of service attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

UCS 6400 Series Fabric Interconnects: before 4.1.3e

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucs-ssh-dos-MgvmyrQy
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCvw33513

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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