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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.002 (13.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 13.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
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
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.