#VU56428 Input validation error in Cisco IOS XR - CVE-2021-34720

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Main Vulnerability Database Vulnerabilities #VU56428

#VU56428 Input validation error in Cisco IOS XR - CVE-2021-34720

Published: September 9, 2021


Vulnerability identifier: #VU56428
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-34720
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Cisco IOS XR
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 socket creation failures are mishandled during the IP Service Level Agreements (IP SLA) and Two-Way Active Measurement Protocol (TWAMP) processes. A remote attacker can send specially crafted IP SLA or TWAMP packets and perform a denial of service (DoS) attack.


Remediation

Install updates from vendor's website.

External links