Resource exhaustion in Cisco Nx-Os Software
CVE-2020-3168
A vulnerability in the Secure Login Enhancements capability of Cisco Nexus 1000V Switch for VMware vSphere could allow an unauthenticated, remote attacker to cause an affected Nexus 1000V Virtual Supervisor Module (VSM) to become inaccessible to users through the CLI. The vulnerability is due to improper resource allocation during failed CLI login attempts when login parameters that are part of the Secure Login Enhancements capability are configured on an affected device. An attacker could exploit this vulnerability by performing a high amount of login attempts against the affected device. A successful exploit could cause the affected device to become inaccessible to other users, resulting in a denial of service (DoS) condition requiring a manual power cycle of the VSM to recover.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.016 (75.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000
Affected products
- Cisco Nx-Os Software — versions unspecified
- Cisco Nexus 1000v
- Cisco Nx-Os — versions 5.2\(1\)sv3\(4.1a\), 5.2(1)sv3(4.1a)
Weakness classification (CWE)
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200226… (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-3168?
- CVE-2020-3168 is a high-severity vulnerability in Cisco Nx-Os Software, classified under CWE-399. CVSS score: 7.5/10. Published 2020-02-26.
- How severe is CVE-2020-3168?
- High severity. CVSS v3 base score is 7.5 out of 10.