Remote code execution in Cisco FXOS and NX-OS Software Cisco Discovery protocol

Published: 2022-08-24

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2022-20824
CWE-ID	CWE-121
Exploitation vector	Local network
Public exploit	N/A
Vulnerable software Subscribe	Cisco NX-OS Operating systems & Components / Operating system
Vendor	Cisco Systems, Inc

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Stack-based buffer overflow

EUVDB-ID: #VU66750

Risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-20824

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the Cisco Discovery Protocol feature. A remote unauthenticated attacker can send a malicious Cisco Discovery Protocol packet to an affected device, trigger a stack-based buffer overflow and execute arbitrary code on the target system with root privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable device.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco NX-OS: 8.2 - 9.3.7a

External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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