SB2021032615 - Denial of service in Cisco IOS XE Software for Network Convergence System 520 Routers
Published: March 26, 2021
Security Bulletin ID
SB2021032615
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) Resource management error (CVE-ID: CVE-2021-1394)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources within the ingress traffic manager of Cisco IOS XE Software for Cisco Network Convergence System (NCS) 520 Routers when pressing IPv4 TCP traffic. A remote attacker can send a large number of crafted TCP packets to the affected device and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.