Security Bulletin
This security bulletin contains one low risk vulnerability.
EUVDB-ID: #VU79968
Risk: Low
CVSSv3.1: 6.2 [CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-20168
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input in TACACS+ and RADIUS. A local attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco NX-OS: 4.2(1)SV1(4) - 10.3(2)
Cisco MDS 9000 Series Multilayer Switches: All versions
Nexus 1000 Virtual Edge for VMware vSphere: All versions
Nexus 1000V Switch for Microsoft Hyper-V: All versions
Nexus 1000V Switch for VMware vSphere: All versions
Cisco Nexus 3000 Series Switches: All versions
Nexus 5500 Platform Switches: All versions
Nexus 5600 Platform Switches: All versions
Nexus 6000 Series Switches: All versions
Nexus 7000 Series Switches: All versions
Cisco Nexus 9000 Series Switches NX-OS Mode: All versions
External linksQ & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.