CVE-2021-34718CWE-88

Cisco IOS XR Software Arbitrary File Read and Write Vulnerability

High · published September 9, 2021

CVSS v3.1
8.1
EPSS
2%
Percentile
75.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.01581 · 75.3th percentile
Weakness
CWE-88 · Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Published
2021-09-09T05:00Z
EPSS history
Timeline
  • 09 SEP 05:00Z
    Cisco IOS XR Software Arbitrary File Read and Write Vulnerability
    cvelistv5