CVE-2022-20697: cisco cisco_ios Insufficient Control Flow Management

Vulnerability summary

CVE-2022-20697 is a high (CVSS 8.6) Insufficient Control Flow Management vulnerability in cisco cisco_ios. EPSS estimates a 1.16% chance of exploitation in the next 30 days, higher than 66.4% of scored vulnerabilities.

Timeline

1. 15-04-2022
   PublishedVulnerability first disclosed.
2. 06-11-2024
   Last modifiedVulnerability information updated.

Description

A vulnerability in the web services interface of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to improper resource management in the HTTP server code. An attacker could exploit this vulnerability by sending a large number of HTTP requests to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

• CWE-691Insufficient Control Flow ManagementThe code does not sufficiently manage its control flow during execution, creating conditions in which the control flow can be modified in unexpected ways.
• CWE-772Missing Release of Resource after Effective LifetimeThe product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.