CVE-2020-21047

MediumCVSS 5.5/10Last modified Oct 14, 2026

Description

The libcpu component which is used by libasm of elfutils version 0.177 (git 47780c9e), suffers from denial-of-service vulnerability caused by application crashes due to out-of-bounds write (CWE-787), off-by-one error (CWE-193) and reachable assertion (CWE-617); to exploit the vulnerability, the attackers need to craft certain ELF files which bypass the missing bound checks.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-787

Affected software

VendorProductVersions
n/an/an/a
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.0, < V3.1.5
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.0, < V3.1.5
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP>= V3.1.0, < V3.1.5
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP>= V3.1.0, < V3.1.5
SiemensSIPLUS S7-1500 CPU 1518-4 PN/DP MFP>= V3.1.0, < V3.1.5
SiemensRUGGEDCOM ROX MX5000< V2.17.0
SiemensRUGGEDCOM ROX MX5000RE< V2.17.0
SiemensRUGGEDCOM ROX RX1400< V2.17.0
SiemensRUGGEDCOM ROX RX1500< V2.17.0
SiemensRUGGEDCOM ROX RX1501< V2.17.0
SiemensRUGGEDCOM ROX RX1510< V2.17.0
SiemensRUGGEDCOM ROX RX1511< V2.17.0
SiemensRUGGEDCOM ROX RX1512< V2.17.0
SiemensRUGGEDCOM ROX RX1524< V2.17.0
SiemensRUGGEDCOM ROX RX1536< V2.17.0
SiemensRUGGEDCOM ROX RX5000< V2.17.0

References

Timeline

Published
Aug 22, 2023
Last modified
Oct 14, 2026
NVD status
Modified

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CVE-2020-21047: Medium severity, CVSS 5.5 | Vulnix