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CVE-2023-20273

Cisco — Cisco IOS XE Web UI Command Injection Vulnerability

Cisco · CWE-78 — Operating system command injection · in CISA KEV since 2023-10-23

KEV since 2023 · listed over a yearCISA KEVActively Exploited
82

EVRS 82 of 100 Urgent

Patch This Cycle

Rank 535 of 2,960 tracked

Download PDF

Why it scores 82

Evidence available: 6 of 7 signals

Listed in the CISA KEV catalog, and an EPSS probability of 0.930.

  • CISA KEVApplied
  • RansomwareDid not apply
  • Vendor exploitationDid not apply
  • EPSSApplied
  • Microsoft Exploitability IndexNot applicable
  • Pre-patch disclosureNo data
  • KEV recencyDid not apply
  • CVSSApplied

The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data

Fix

Patch or fixed version identified

CISA required action

Fixed in

ios xe: update to 17.3.8a or later | ios xe: update to 17.6.6a or later | ios xe: update to 17.9.4a or later | ios xe: update to 16.12.10a or later

Affected versions

  • ios xe16.1.116.1.216.1.316.2.116.2.216.3.1a16.3.216.3.316.3.416.3.516.3.5b16.3.616.3.716.3.816.3.916.3.1016.3.1116.4.116.4.216.4.316.5.116.5.1a16.5.1b16.5.216.5.316.6.116.6.216.6.316.6.416.6.4a16.6.516.6.5a16.6.616.6.716.6.816.6.916.6.1016.7.116.7.1a16.7.1b16.7.216.7.316.7.416.8.116.8.1a16.8.1b16.8.1c16.8.1d16.8.1e16.8.1s16.8.216.8.316.9.116.9.1a16.9.1b16.9.1s16.9.216.9.316.9.3a16.9.416.9.516.9.5f16.9.616.9.716.9.816.10.116.10.1a16.10.1b16.10.1c16.10.1d16.10.1e16.10.1f16.10.1g16.10.1s16.10.216.10.316.11.116.11.1a16.11.1b16.11.1s16.11.216.12.116.12.1a16.12.1c16.12.1s16.12.1t16.12.1w16.12.1x16.12.1y16.12.1z116.12.1z216.12.216.12.2a16.12.2s16.12.316.12.3a16.12.3s16.12.416.12.4a16.12.516.12.5a16.12.5b16.12.616.12.6a16.12.716.12.816.12.916.12.1017.1.117.1.1a17.1.1s17.1.1t17.1.317.2.117.2.1a17.2.1r17.2.1v17.2.217.2.317.3.117.3.1a17.3.1w17.3.1x17.3.1z17.3.217.3.2a17.3.317.3.417.3.4a17.3.4b17.3.4c17.3.517.3.5a17.3.5b17.3.617.3.717.3.817.4.117.4.1a17.4.1b17.4.217.4.2a17.5.117.5.1a17.5.1b17.5.1c17.6.117.6.1a17.6.1w17.6.1x17.6.1y17.6.1z17.6.1z117.6.217.6.317.6.3a17.6.417.6.517.6.617.7.117.7.1a17.7.1b17.7.217.8.117.8.1a17.9.117.9.1a17.9.1w17.9.1x17.9.1x117.9.1y17.9.1y117.9.217.9.2a17.9.317.9.3a17.9.417.10.117.10.1a17.10.1b17.11.117.11.1a17.11.99sw17.12.117.12.1a>= 17.3 < 17.3.8a>= 17.6 < 17.6.6a>= 17.9 < 17.9.4a>= 16.12 < 16.12.10a
  • catalyst 3650
  • catalyst 3650-12x48fd-e
  • catalyst 3650-12x48fd-l
  • catalyst 3650-12x48fd-s
  • catalyst 3650-12x48uq
  • catalyst 3650-12x48uq-e
  • catalyst 3650-12x48uq-l

+116 more affected products; see the full list at NVD.

Remediation

Verify that instances of Cisco IOS XE Web UI are in compliance with BOD 23-02 and apply mitigations per vendor instructions. For affected products (Cisco IOS XE Web UI exposed to the internet or to untrusted networks), follow vendor instructions to determine if a system may have been compromised and immediately report positive findings to CISA.

Fixed versions from NVD.

Evidence

Each value with its source
MeasureValueSource
CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. 7.2 NVD
FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. 0.930 (99.83rd pctl) FIRST EPSS
Actively exploitedWhether a source of record has confirmed attacks using it in the wild. Confirmed CISA KEV
Ransomware campaign useWhether CISA has seen ransomware operators use it. Unknown or none CISA KEV
CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. 2023-10-27 · KEV since 2023 · listed over a year CISA KEV
Public exploit moduleA module existing is not the same as active exploitation. Public module exists Metasploit
EUVD cross-referenceENISA's record: CVSS 7.2 (v3.1), assigned by cisco. Listed ENISA EUVD

Description

NVD

A vulnerability in the web UI feature of Cisco IOS XE Software could allow an authenticated, remote attacker to inject commands with the privileges of root. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted input to the web UI. A successful exploit could allow the attacker to inject commands to the underlying operating system with root privileges.

What CISA says to do

Public module

Metasploit lists the best-ranked (excellent) of 2 public modules for this CVE: Cisco IOX XE Unauthenticated RCE Chain (linux/misc/cisco_ios_xe_rce). A module existing is not the same as active exploitation; see metasploit.com.