Buffer overflow in Cisco Nx-Os Software
CVE-2023-20168
A vulnerability in TACACS+ and RADIUS remote authentication for Cisco NX-OS Software could allow an unauthenticated, local attacker to cause an affected device to unexpectedly reload. This vulnerability is due to incorrect input validation when processing an authentication attempt if the directed request option is enabled for TACACS+ or RADIUS. An attacker could exploit this vulnerability by entering a crafted string at the login prompt of an affected device. A successful exploit could allow the attacker to cause the affected device to unexpectedly reload, resulting in a denial of service (DoS) condition.
Vulnerability class: Buffer Overflow
EPSS: 0.002 (10.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Cisco Nx-os Software — versions 4.2(1)SV1(4), 4.2(1)SV1(4a), 4.2(1)SV1(4b)
- Cisco Mds_9000
- Cisco Mds_9100
- Cisco Mds_9132t
- Cisco Mds_9134
- Cisco Mds_9140
- Cisco Mds_9148
- Cisco Mds_9148s
- Cisco Mds_9148t
- Cisco Mds_9200
Weakness classification (CWE)
References
- psirt@cisco.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2023-20168?
- CVE-2023-20168 is a high-severity vulnerability in Cisco Nx-Os Software, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.1/10. Published 2023-08-23.
- How severe is CVE-2023-20168?
- High severity. CVSS v3 base score is 7.1 out of 10.