SB2021090906 - Denial of service in Cisco IOS XR Software for ASR 9000 Series Routers
Published: September 9, 2021
Security Bulletin ID
SB2021090906
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Resource management error (CVE-ID: CVE-2021-34713)
CWE-ID: CWE-399 - Resource Management Errors
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources in the Layer 2 punt code of Cisco IOS XR Software running on Cisco ASR 9000 Series Aggregation Services Routers. A remote attacker on the local network can pass specially crafted data to the application and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.