CVE-2023-4346

Katalog CVE

CVSS 7.5 · High KEV · sudah dieksploitasi EPSS 1,3%

Kerentanan Overly Restrictive Account Lockout Mechanism pada knx connection authorization. Skor CVSS 3.1 7.5 (High) menurut NVD. Masuk katalog KEV CISA pada 15 Juli 2026, artinya sudah terbukti dieksploitasi.

Deskripsi (NVD)

KNX devices that use KNX Connection Authorization and support Option 1 are, depending on the implementation, vulnerable to being locked and users being unable to reset them to gain access to the device. The BCU key feature on the devices can be used to create a password for the device, but this password can often not be reset without entering the current password. If the device is configured to interface with a network, an attacker with access to that network could interface with the KNX installation, purge all devices without additional security options enabled, and set a BCU key, locking the device. Even if a device is not connected to a network, an attacker with physical access to the device could also exploit this vulnerability in the same way.

Rincian

Terbit di NVD

29 Agustus 2023

Terakhir diubah

16 Juli 2026

Status NVD

Analyzed

CVSS 3.1

7.5 (High), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-645: Overly Restrictive Account Lockout Mechanism

EPSS (30 hari)

1,3% peluang dieksploitasi; lebih tinggi dari 69,5% CVE lain

Known Exploited Vulnerabilities (CISA)

Nama

KNX Association KNX Protocol Connection Authorization Option 1 Overly Restrictive Account Lockout Mechanism Vulnerability

Masuk KEV

15 Juli 2026

Tenggat CISA

29 Juli 2026 (untuk instansi federal AS)

Ransomware

Belum tercatat

Tindakan wajib

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://www.cisa.gov/news-events/ics-advisories/icsa-23-236-01 advisory pihak ketiga · pemerintah AS
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-4346 pemerintah AS