CVE-2019-1846

CVSS V2 Medium 6.1 CVSS V3 High 7.4
Description
A vulnerability in the Multiprotocol Label Switching (MPLS) Operations, Administration, and Maintenance (OAM) implementation of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers could allow an unauthenticated, adjacent attacker to trigger a denial of service (DoS) condition on an affected device. The vulnerability is due to the incorrect handling of certain MPLS OAM packets. An attacker could exploit this vulnerability by sending malicious MPLS OAM packets to an affected device. A successful exploit could allow the attacker to cause the lspv_server process to crash. The crash could lead to system instability and the inability to process or forward traffic though the device, resulting in a DoS condition that require manual intervention to restore normal operating conditions.
Overview
  • CVE ID
  • CVE-2019-1846
  • Assigner
  • ykramarz@cisco.com
  • Vulnerability Status
  • Modified
  • Published Version
  • 2019-05-16T02:29:00
  • Last Modified Date
  • 2019-10-09T23:48:19
Weakness Enumerations
CWE URL
CWE-20 http://cwe.mitre.org/data/definitions/20.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:cisco:ios_xr:5.3.3:sp10:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:asr_9000v:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9006:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9010:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9901:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9904:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9906:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9910:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9912:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_9922:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:A/AC:L/Au:N/C:N/I:N/A:C
  • Access Vector
  • ADJACENT_NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 6.1
  • Severity
  • MEDIUM
  • Exploitability Score
  • 6.5
  • Impact Score
  • 6.9
CVSS Version 3
  • Version
  • 3.0
  • Vector String
  • CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
  • Attack Vector
  • ADJACENT_NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • CHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 7.4
  • Base Severity
  • HIGH
  • Exploitability Score
  • 2.8
  • Impact Score
  • 4
References
Reference URL Reference Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-asr9k-mpls-dos Vendor Advisory
http://www.securityfocus.com/bid/108363 Third Party Advisory VDB Entry
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2019-1846
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-1846
History
Created Old Value New Value Data Type Notes
2022-05-10 17:02:55 Added to TrackCVE
2022-12-03 20:45:37 psirt@cisco.com ykramarz@cisco.com CVE Assigner updated
2022-12-03 20:45:37 2019-05-16T02:29Z 2019-05-16T02:29:00 CVE Published Date updated
2022-12-03 20:45:37 2019-10-09T23:48:19 CVE Modified Date updated
2022-12-03 20:45:37 Modified Vulnerability Status updated