Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2021-34718

A vulnerability in the SSH Server process of Cisco IOS XR Software could allow an authenticated, remote attacker to overwrite and read arbitrary files on the local device. This vulnerability is due to insufficient input validation of arguments that are supplied by the user for a specific file transfer method. An attacker with lower-level privileges could exploit this vulnerability by specifying Secure Copy Protocol (SCP) parameters when authenticating to a device. A successful exploit could allow the attacker to elevate their privileges and retrieve and upload files on a device that they should not have access to.

Published

2021-09-09T05:15:11.103

Last Modified

2024-11-21T06:11:02.320

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.1 (HIGH)

CVSSv2 Vector

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

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

8.0

Impact Score

9.2

Weaknesses
  • Type: Secondary
    CWE-88
  • Type: Primary
    CWE-88
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_4009 - No
Hardware cisco ncs_4016 - 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
References