CVE-2020-27738

Katalog CVE

CVSS 7.4 · High EPSS 3,7%

Kerentanan Access of Memory Location After End of Buffer pada siemens simotics connect 400 firmware, siemens nucleus net +3 lainnya. Skor CVSS 3.1 7.4 (High) menurut NVD.

Deskripsi (NVD)

A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.20), APOGEE PXC Modular (BACnet) (All versions < V3.5.5), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.20), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.3), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (Versions including affected DNS modules), SIMOTICS CONNECT 400 (All versions < V0.5.0.0), TALON TC Compact (BACnet) (All versions < V3.5.5), TALON TC Modular (BACnet) (All versions < V3.5.5). The DNS domain name record decompression functionality does not properly validate the pointer offset values. The parsing of malformed responses could result in a read access past the end of an allocated structure. An attacker with a privileged position in the network could leverage this vulnerability to cause a denial-of-service condition.

Rincian

Terbit di NVD

22 April 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-788: Access of Memory Location After End of Buffer
CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

EPSS (30 hari)

3,7% peluang dieksploitasi; lebih tinggi dari 89,3% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://cert-portal.siemens.com/productcert/pdf/ssa-669158.pdf patch · advisory vendor
• https://cert-portal.siemens.com/productcert/pdf/ssa-705111.pdf patch · advisory vendor
• https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf