CVE-2023-35945: envoy before 1.23.11 (exclusive), from 1.24.0 (inclusive), before 1.24.9 (exclusive), from 1.25.0 (inclusive), before…

Affected technology

envoy · before 1.23.11 (exclusive)
envoyproxy

envoy · from 1.24.0 (inclusive), before 1.24.9 (exclusive)
envoyproxy

envoy · from 1.25.0 (inclusive), before 1.25.8 (exclusive)
envoyproxy

envoy · from 1.26.0 (inclusive), before 1.26.3 (exclusive)
envoyproxy

nghttp2 · before 1.55.1 (exclusive)
nghttp2

envoy · >= 1.26.0, < 1.26.3, >= 1.25.0, < 1.25.8, >= 1.24.0, < 1.24.9, >= 1.23.0, < 1.23.11
envoyproxy

SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · V3.1.0 to before V3.1.5
Siemens

SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · V3.1.0 to before V3.1.5
Siemens

SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · V3.1.0 to before V3.1.5
Siemens

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

Attack conditions (NVD, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Vendor/CNA’s CVSS 3.1 assessment (base score 7.5/10) rates confidentiality and integrity impact as none; availability impact as high. NVD’s CVSS 3.1 assessment (base score 7.5/10) rates confidentiality and integrity impact as none; availability impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.