Vulnerability · Published Feb 26, 2020 · Assigned by cisco

CVE-2020-3170Cisco NX-OS Software NX-API Denial of Service Vulnerability

Medium 5.3

In plain English

A medium-severity improper input validation in Cisco NX-OS Software 7.3(2)D1(1d) from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 78% of all known vulnerabilities).

Severity (CVSS 3.0)5.3Medium

Exploit odds (30 days)1.7%top 22.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause an NX-API system process to unexpectedly restart. The vulnerability is due to incorrect validation of the HTTP header of a request that is sent to the NX-API. An attacker could exploit this vulnerability by sending a crafted HTTP request to the NX-API on an affected device. A successful exploit could allow the attacker to cause a denial of service (DoS) condition in the NX-API service; however, the Cisco NX-OS device itself would still be available and passing network traffic. Note: The NX-API feature is disabled by default.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco NX-OS Software 7.3(2)D1(1d)	unspecified – before n/a

Weakness: CWE-20 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

20200226 Cisco NX-OS Software NX-API Denial of Service Vulnerability vendor-advisory, x_refsource_CISCO