Denial of service in Cisco ASR 5000 Series - CVE-2017-6729
Published: July 7, 2017
Vulnerability identifier: #VU7369
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-6729
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco ASR 5000 Series
Cisco ASR 5000 Series
Detailed vulnerability description
The vulnerability allows a remote unauthenticated attacker to cause DoS condition.
The weakness exists in the Border Gateway Protocol (BGP) processing functionality of the Cisco StarOS operating system for Cisco ASR 5000 Series Routers and Cisco Virtualized Packet Core (VPC) Software due to improper boundary controls for the BGP peering sessions list. A remote attacker can send specially crafted TCP packets to an IPv4 or IPv6 interface and cause the BGP process to reload.
Successful exploitation of the vulnerability results in denial of service.
The weakness exists in the Border Gateway Protocol (BGP) processing functionality of the Cisco StarOS operating system for Cisco ASR 5000 Series Routers and Cisco Virtualized Packet Core (VPC) Software due to improper boundary controls for the BGP peering sessions list. A remote attacker can send specially crafted TCP packets to an IPv4 or IPv6 interface and cause the BGP process to reload.
Successful exploitation of the vulnerability results in denial of service.
How to mitigate CVE-2017-6729
The vulnerability is addressed in the following versions:
21.3.A0.65902, 21.2.A0.65905, 21.1.b0.66164, 21.1.V0.66014, 21.1.R0.65898, 21.1.M0.65894, 21.1.0.66030, 21.1.0.
21.3.A0.65902, 21.2.A0.65905, 21.1.b0.66164, 21.1.V0.66014, 21.1.R0.65898, 21.1.M0.65894, 21.1.0.66030, 21.1.0.