Denial of service in Cisco NX-OS Software
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-1587 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Cisco Nexus 3000 Series Switches Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco Nexus 9000 Series Switches NX-OS Mode Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco NX-OS Operating systems & Components / Operating system |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Input validation error
EUVDB-ID: #VU56114
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-1587
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper handling of specific packets in the VXLAN Operation, Administration, and Maintenance (OAM) feature. A remote attacker can send a specially crafted packet and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco Nexus 3000 Series Switches: All versions
Cisco Nexus 9000 Series Switches NX-OS Mode: All versions
Cisco NX-OS: before 9.3.7a
External linkshttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ngoam-dos-LTDb9Hv
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.
