SB2021090911 - Denial of service in Cisco IOS XR Software
Published: September 9, 2021
Security Bulletin ID
SB2021090911
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2021-34720)
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 update from vendor's website.