Vulnerability Monitor

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CVE-2021-34721

Multiple vulnerabilities in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to gain access to the underlying root shell of an affected device and execute arbitrary commands with root privileges. For more information about these vulnerabilities, see the Details section of this advisory.

Published

2021-09-09T05:15:11.677

Last Modified

2024-11-21T06:11:02.840

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.7 (MEDIUM)

CVSSv2 Vector

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

  • Access Vector: LOCAL
  • Access Complexity: MEDIUM
  • Authentication: NONE
  • Confidentiality Impact: COMPLETE
  • Integrity Impact: COMPLETE
  • Availability Impact: COMPLETE
Exploitability Score

3.4

Impact Score

10.0

Weaknesses
  • Type: Secondary
    CWE-78
  • Type: Primary
    CWE-78
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco ios_xr < 7.3.2 Yes
Operating System cisco ios_xr ≤ 7.4.1 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 < 7.3.2 Yes
Operating System cisco ios_xr ≤ 7.4.1 Yes
Hardware cisco ios_xrv - No
Hardware cisco ios_xrv_9000 - No
Operating System cisco ios_xr < 7.3.2 Yes
Operating System cisco ios_xr < 7.4.1 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 < 7.3.2 Yes
Operating System cisco ios_xr < 7.4.1 Yes
Hardware cisco ncs_5001 - No
Hardware cisco ncs_5002 - No
Hardware cisco ncs_5011 - No
Operating System cisco ios_xr < 7.3.2 Yes
Operating System cisco ios_xr < 7.4.1 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 < 7.3.2 Yes
Operating System cisco ios_xr < 7.4.1 Yes
Hardware cisco ncs_6000 - No
Hardware cisco ncs_6008 - No
Operating System cisco ios_xr < 7.3.2 Yes
Operating System cisco ios_xr < 7.4.1 Yes
Hardware cisco ncs_1001 - No
Hardware cisco ncs_1002 - No
Hardware cisco ncs_1004 - No
Operating System cisco ios_xr < 7.3.2 Yes
Operating System cisco ios_xr < 7.4.1 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