SB2017060809 - Denial of service in Cisco Network Convergence System 5500 Series
Published: June 8, 2017
Security Bulletin ID
SB2017060809
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Denial of service (CVE-ID: CVE-2017-6666)
The vulnerability allows local authenticated attacker to cause DoS condition on the target system.The weakness exists in the forwarding component of Cisco IOS XR Software for Cisco Network Convergence System (NCS) 5500 Series Routers due to adjacency information for a Traffic Engineering (TE) tunnel's physical source interface is not propagated to hardware after the adjacency is lost. A local attacker can log in to the router's CLI with administrator privileges, issue the clear arp-cache command and cause the router to stop forwarding data traffic across Traffic Engineering (TE) tunnels.
Successful exploitation of the vulnerability results in denial of service.
Remediation
Install update from vendor's website.