Vulnerability Monitor

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CVE-2021-34720

A vulnerability in the IP Service Level Agreements (IP SLA) responder and Two-Way Active Measurement Protocol (TWAMP) features of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause device packet memory to become exhausted or cause the IP SLA process to crash, resulting in a denial of service (DoS) condition. This vulnerability exists because socket creation failures are mishandled during the IP SLA and TWAMP processes. An attacker could exploit this vulnerability by sending specific IP SLA or TWAMP packets to an affected device. A successful exploit could allow the attacker to exhaust the packet memory, which will impact other processes, such as routing protocols, or crash the IP SLA process.

Published

2021-09-09T05:15:11.463

Last Modified

2024-11-21T06:11:02.663

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.6 (HIGH)

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-771
  • Type: Primary
    NVD-CWE-Other
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco ios_xr < 6.2.3 Yes
Operating System cisco ios_xr < 6.3.2 Yes
Operating System cisco ios_xr < 7.2.2 Yes
Hardware cisco asr_9000v-v2 - No
Hardware cisco asr_9001 - No
Hardware cisco asr_9006 - No
Hardware cisco asr_9010 - No
Hardware cisco asr_9901 - No
Hardware cisco asr_9902 - No
Hardware cisco asr_9903 - 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
Operating System cisco ios_xr < 6.2.3 Yes
Operating System cisco ios_xr < 6.3.2 Yes
Operating System cisco ios_xr < 7.2.2 Yes
Hardware cisco ios_xrv - No
Hardware cisco ios_xrv_9000 - No
Operating System cisco ios_xr < 6.2.3 Yes
Operating System cisco ios_xr < 6.3.2 Yes
Operating System cisco ios_xr < 7.2.2 Yes
Hardware cisco ncs_520 - No
Hardware cisco ncs_540 - No
Hardware cisco ncs_540_fronthaul - No
Hardware cisco ncs_560-4 - No
Hardware cisco ncs_560-7 - No
Operating System cisco ios_xr < 6.2.3 Yes
Operating System cisco ios_xr < 6.3.2 Yes
Operating System cisco ios_xr < 7.2.2 Yes
Hardware cisco ncs_5001 - No
Hardware cisco ncs_5002 - No
Hardware cisco ncs_5011 - No
Operating System cisco ios_xr < 6.2.3 Yes
Operating System cisco ios_xr < 6.3.2 Yes
Operating System cisco ios_xr < 7.2.2 Yes
Hardware cisco ncs_4009 - No
Hardware cisco ncs_4016 - No
Operating System cisco ios_xr < 6.2.3 Yes
Operating System cisco ios_xr < 6.3.2 Yes
Operating System cisco ios_xr < 7.2.2 Yes
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
Operating System cisco ios_xr < 6.2.3 Yes
Operating System cisco ios_xr < 6.3.2 Yes
Operating System cisco ios_xr < 7.2.2 Yes
Hardware cisco ncs_6000 - No
Hardware cisco ncs_6008 - No
Operating System cisco ios_xr < 6.2.3 Yes
Operating System cisco ios_xr < 6.3.2 Yes
Operating System cisco ios_xr < 7.2.2 Yes
Hardware cisco ncs_1001 - No
Hardware cisco ncs_1002 - No
Hardware cisco ncs_1004 - No
Operating System cisco ios_xr < 6.2.3 Yes
Operating System cisco ios_xr < 6.3.2 Yes
Operating System cisco ios_xr < 7.2.2 Yes
Hardware cisco 8101-32fh - No
Hardware cisco 8101-32h - No
Hardware cisco 8102-64h - No
Hardware cisco 8201 - No
Hardware cisco 8201-32fh - No
Hardware cisco 8202 - No
Hardware cisco 8804 - No
Hardware cisco 8808 - No
Hardware cisco 8812 - No
Hardware cisco 8818 - No
References