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CISACISA-KEV-CVE-2023-20273

HistoryOct 23, 2023 - 12:00 a.m.

Cisco IOS XE Web UI Command Injection Vulnerability

2023-10-2300:00:00

CISA

www.cisa.gov

cisco

ios xe

command injection

web ui

vulnerability

privilege escalation

cve-2023-20198

local user

root

file system

cve-2023-20273

implant deployment

cve-2021-1435

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.866

Percentile

98.7%

JSON

Cisco IOS XE contains a command injection vulnerability in the web user interface. When chained with CVE-2023-20198, the attacker can leverage the new local user to elevate privilege to root and write the implant to the file system. Cisco identified CVE-2023-20273 as the vulnerability exploited to deploy the implant. CVE-2021-1435, previously associated with the exploitation events, is no longer believed to be related to this activity.