Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2019-16018

A vulnerability in the implementation of Border Gateway Protocol (BGP) Ethernet VPN (EVPN) functionality in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to incorrect processing of a BGP update message that contains crafted EVPN attributes. An attacker could indirectly exploit the vulnerability by sending BGP EVPN update messages with a specific, malformed attribute to an affected system and waiting for a user on the device to display the EVPN operational routes’ status. If successful, the attacker could cause the BGP process to restart unexpectedly, resulting in a DoS condition. The Cisco implementation of BGP accepts incoming BGP traffic only from explicitly defined peers. To exploit this vulnerability, the malicious BGP update message would need to come from a configured, valid BGP peer, or would need to be injected by the attacker into the victim's BGP network on an existing, valid TCP connection to a BGP peer.

Published

2020-01-26T05:15:14.413

Last Modified

2024-11-21T04:29:56.110

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.5 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

  • Access Vector: NETWORK
  • Access Complexity: MEDIUM
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: PARTIAL
Exploitability Score

8.6

Impact Score

2.9

Weaknesses
  • Type: Secondary
    CWE-399
  • Type: Primary
    CWE-400
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco ios_xr 6.6.1 Yes
Hardware cisco asr_9000v - No
Hardware cisco asr_9001 - No
Hardware cisco asr_9006 - No
Hardware cisco asr_9010 - No
Hardware cisco asr_9901 - No
Hardware cisco asr_9904 - No
Hardware cisco asr_9906 - No
Hardware cisco asr_9910 - No
Hardware cisco asr_9912 - No
Hardware cisco asr_9922 - No
Hardware cisco ncs_540 - No
Hardware cisco ncs_5501 - No
Hardware cisco ncs_5501-se - No
Hardware cisco ncs_5502 - No
Hardware cisco ncs_5502-se - No
Hardware cisco ncs_5508 - No
Hardware cisco ncs_5516 - No
Hardware cisco ncs_6000 - No
Operating System cisco ios_xr 6.6.2 Yes
Hardware cisco asr_9000v - No
Hardware cisco asr_9000v - No
Hardware cisco asr_9001 - No
Hardware cisco asr_9001 - No
Hardware cisco asr_9006 - No
Hardware cisco asr_9006 - No
Hardware cisco asr_9010 - No
Hardware cisco asr_9010 - No
Hardware cisco asr_9901 - No
Hardware cisco asr_9901 - No
Hardware cisco asr_9904 - No
Hardware cisco asr_9904 - No
Hardware cisco asr_9906 - No
Hardware cisco asr_9906 - No
Hardware cisco asr_9910 - No
Hardware cisco asr_9910 - No
Hardware cisco asr_9912 - No
Hardware cisco asr_9912 - No
Hardware cisco asr_9922 - No
Hardware cisco asr_9922 - No
Hardware cisco crs - No
Hardware cisco ncs_5501 - No
Hardware cisco ncs_5501-se - No
Hardware cisco ncs_5502 - No
Hardware cisco ncs_5502-se - No
Hardware cisco ncs_5508 - No
Hardware cisco ncs_5516 - No
Hardware cisco xrv_9000 - No
Operating System cisco ios_xr 6.6.25 Yes
Hardware cisco ncs_540 - No
Hardware cisco ncs_540l - No
Hardware cisco ncs_5501 - No
Hardware cisco ncs_5501-se - No
Hardware cisco ncs_5502 - No
Hardware cisco ncs_5502-se - No
Hardware cisco ncs_5508 - No
Hardware cisco ncs_5516 - No
Hardware cisco ncs_560 - No
Hardware cisco ncs_6000 - No
Operating System cisco ios_xr 7.0.1 Yes
Hardware cisco asr_9000v - No
Hardware cisco asr_9001 - No
Hardware cisco asr_9006 - No
Hardware cisco asr_9010 - No
Hardware cisco asr_9901 - No
Hardware cisco asr_9904 - No
Hardware cisco asr_9906 - No
Hardware cisco asr_9910 - No
Hardware cisco asr_9912 - No
Hardware cisco asr_9922 - No
Hardware cisco ncs_1001 - No
Hardware cisco ncs_1002 - No
Hardware cisco ncs_1004 - No
Hardware cisco ncs_5001 - No
Hardware cisco ncs_5002 - No
Hardware cisco ncs_540 - No
Hardware cisco ncs_540l - No
Hardware cisco ncs_5501 - No
Hardware cisco ncs_5501-se - No
Hardware cisco ncs_5502 - No
Hardware cisco ncs_5502-se - No
Hardware cisco ncs_5508 - No
Hardware cisco ncs_5516 - No
Hardware cisco ncs_560 - No
Hardware cisco ncs_6000 - No
Hardware cisco xrv_9000 - No
References