SB2017110804 - Denial of service in Cisco IOS XE
Published: November 8, 2017
Security Bulletin ID
SB2017110804
Severity
Low
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) Improper input validation (CVE-ID: CVE-2017-12319)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists in the Border Gateway Protocol (BGP) over an Ethernet Virtual Private Network (EVPN) for Cisco IOS XE Software due to changes in the implementation of the BGP MPLS-Based Ethernet VPN RFC (RFC 7432) draft. A remote attacker can send a specially crafted BGP Inclusive Multicast Ethernet Tag Route or BGP EVPN MAC/IP Advertisement Route update packet, corrupt the BGP routing table and cause the device to reload.
Successful exploitation of the vulnerability results in denial of service.
Remediation
Install update from vendor's website.