MitM attack in Cisco HyperFlex

Published: 2019-08-22

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2019-12621
CWE-ID	CWE-321
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Cisco HyperFlex Hardware solutions / Office equipment, IP-phones, print servers
Vendor	Cisco Systems, Inc

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Use of Hard-coded Cryptographic Key

EUVDB-ID: #VU20361

Risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-12621

CWE-ID: CWE-321 - Use of Hard-coded Cryptographic Key

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a man-in-the-middle attack.

The vulnerability exists due to insufficient key management. A remote attacker can obtain a specific encryption key for the cluster and perform a man-in-the-middle attack against other nodes in the cluster.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco HyperFlex: before 4.0.1a

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190821-hyperflex-sslkey

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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