Improper Interaction Between Multiple Correctly-Behaving Entities in Cisco IOS and Cisco IOS XE - CVE-2021-34699

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Main Vulnerability Database Vulnerabilities #VU56873

Improper Interaction Between Multiple Correctly-Behaving Entities in Cisco IOS and Cisco IOS XE - CVE-2021-34699

Published: September 24, 2021


Vulnerability identifier: #VU56873
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-34699
CWE-ID: CWE-435
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Cisco IOS
Cisco IOS XE
Software vendor:
Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to an improper interaction between the web UI and the CLI parser. A remote authenticated attacker can request a particular CLI command to be run through the web UI and cause a denial of service condition on the target system. 


Remediation

Install update from vendor's website.

External links