CVE

CVE-2020-3422

Date: (C)2020-09-25   (M)2023-12-22

A vulnerability in the IP Service Level Agreement (SLA) responder feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the IP SLA responder to reuse an existing port, resulting in a denial of service (DoS) condition. The vulnerability exists because the IP SLA responder could consume a port that could be used by another feature. An attacker could exploit this vulnerability by sending specific IP SLA control packets to the IP SLA responder on an affected device. The control packets must include the port number that could be used by another configured feature. A successful exploit could allow the attacker to cause an in-use port to be consumed by the IP SLA responder, impacting the feature that was using the port and resulting in a DoS condition.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:		CVSS V2 Severity:
CVSS Score : 7.5		CVSS Score : 4.3
Exploit Score: 3.9		Exploit Score: 8.6
Impact Score: 3.6		Impact Score: 2.9
CVSS V3 Metrics:		CVSS V2 Metrics:
Attack Vector: NETWORK		Access Vector: NETWORK
Attack Complexity: LOW		Access Complexity: MEDIUM
Privileges Required: NONE		Authentication: NONE
User Interaction: NONE		Confidentiality: NONE
Scope: UNCHANGED		Integrity: NONE
Confidentiality: NONE		Availability: PARTIAL
Integrity: NONE
Availability: HIGH

Reference:

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipsla-jw2DJmSv