CVE-2021-34718 HIGH

CVE-2021-34718: Cisco IOS XR Software Arbitrary File Read and Write Vulnerability

Vendor Cisco
Product Cisco IOS XR Software
Weakness CWE-88
Published September 9, 2021
Last update November 7, 2024

CVSS base score

8.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

September 9, 2021 CVE published
November 7, 2024 Record updated

Related vulnerabilities

04Related CVE