CVE-2019-16018

CVSS V2 Medium 4.3 CVSS V3 Medium 6.5
Description
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.
Overview
  • CVE ID
  • CVE-2019-16018
  • Assigner
  • ykramarz@cisco.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2020-01-26T05:15:14
  • Last Modified Date
  • 2020-02-03T20:03:12
Weakness Enumerations
CWE URL
CWE-400 http://cwe.mitre.org/data/definitions/400.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:cisco:ios_xr:6.6.1:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:asr_9000v:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9006:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9010:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9901:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9904:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9906:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9910:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9912:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9922:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:ncs_540:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5501:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5501-se:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5502:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5502-se:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5508:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5516:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_6000:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:cisco:ios_xr:6.6.2:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:asr_9000v:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9000v:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9006:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9006:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9010:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9010:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9901:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9901:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9904:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9904:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9906:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9906:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9910:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9910:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9912:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9912:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9922:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9922:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:crs:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5501:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5501-se:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5502:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5502-se:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5508:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5516:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:xrv_9000:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:cisco:ios_xr:6.6.25:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:ncs_540:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_540l:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5501:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5501-se:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5502:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5502-se:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5508:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5516:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_560:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_6000:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:cisco:ios_xr:7.0.1:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:asr_9000v:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9006:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9010:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9901:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9904:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9906:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9910:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9912:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:asr_9922:-:*:*:*:*:*:x64:* 0 OR
cpe:2.3:h:cisco:ncs_1001:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_1002:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_1004:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5001:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5002:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_540:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_540l:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5501:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5501-se:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5502:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5502-se:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5508:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_5516:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_560:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:ncs_6000:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:xrv_9000:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:N/I:N/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 4.3
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • REQUIRED
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 6.5
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 2.8
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-ios-xr-routes Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2019-16018
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-16018
History
Created Old Value New Value Data Type Notes
2022-05-10 16:51:12 Added to TrackCVE
2022-12-04 10:07:43 psirt@cisco.com ykramarz@cisco.com CVE Assigner updated
2022-12-04 10:07:43 2020-01-26T05:15Z 2020-01-26T05:15:14 CVE Published Date updated
2022-12-04 10:07:43 2020-02-03T20:03:12 CVE Modified Date updated
2022-12-04 10:07:43 Analyzed Vulnerability Status updated