Vulnerability Monitor

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CVE-2019-1846

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.

Published

2019-05-16T02:29:00.437

Last Modified

2024-11-21T04:37:31.273

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 7.4 (HIGH)

CVSSv2 Vector

AV:A/AC:L/Au:N/C:N/I:N/A:C

  • Access Vector: ADJACENT_NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: COMPLETE
Exploitability Score

6.5

Impact Score

6.9

Weaknesses
  • Type: Secondary
    CWE-20
  • Type: Primary
    CWE-20
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco ios_xr 5.3.3 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
References