PT-2021-14317 · Hilscher · Rcx Rtos

Published 2021-05-13 · Updated 2021-09-09 · CVE-2021-20988

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: Hilscher rcX RTOS versions prior to V2.1.14.1

Description: The issue arises from the lack of verification of the actual UDP packet length against the length indicated by the packet. This can lead to a denial of service of the affected device.

Recommendations: For versions prior to V2.1.14.1, update to version V2.1.14.1 or later to resolve the issue. As a temporary workaround, consider restricting UDP packet handling to minimize the risk of exploitation.

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

CVE-2021-20988

Affected Products

Rcx Rtos

References · 5

• https://kb.hilscher.com/display/ISMS/2019-04-10+Wrong+handling+of+the+UDP+checksum · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-20988 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-20988 · Security Note
• https://cert.vde.com/de-de/advisories/vde-2021-018 · Note
• https://t.me/cvenotify/14388 · Telegram Post