What is the CVSS score of CVE-2021-20988?

CVE-2021-20988 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 1.0%.

Rcx Rtos CVE-2021-20988

HIGH

Buffer Overflow (CWE-119)

2021-05-13 info@cert.vde.com

Buffer Overflow Denial Of Service Rcx Rtos Ice1 16Di G60L V1D Firmware Ice1 16Dio G60L C1 V1D Firmware Ice1 16Dio G60L V1D Firmware Ice1 8Di8Do G60L C1 V1D Firmware Ice1 8Di8Do G60L V1D Firmware Ice1 8Iol G30L V1D Firmware Ice1 8Iol G60L V1D Firmware Ice1 8Iol S2 G60L V1D Firmware

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

CVE Published

May 13, 2021 - 14:15 nvd

HIGH 7.5

DescriptionNVD

In Hilscher rcX RTOS versions prios to V2.1.14.1 the actual UDP packet length is not verified against the length indicated by the packet. This may lead to a denial of service of the affected device.

AnalysisAI

In Hilscher rcX RTOS versions prios to V2.1.14.1 the actual UDP packet length is not verified against the length indicated by the packet. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Buffer Overflow (CWE-119), which allows attackers to corrupt memory to execute arbitrary code or crash the application. In Hilscher rcX RTOS versions prios to V2.1.14.1 the actual UDP packet length is not verified against the length indicated by the packet. This may lead to a denial of service of the affected device. Affected products include: Hilscher Rcx Rtos, Pepperl-Fuchs Ice1-16Di-G60L-V1D Firmware, Pepperl-Fuchs Ice1-16Dio-G60L-C1-V1D Firmware, Pepperl-Fuchs Ice1-16Dio-G60L-V1D Firmware, Pepperl-Fuchs Ice1-8Di8Do-G60L-C1-V1D Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Use memory-safe languages or bounds-checking. Enable ASLR, DEP/NX, stack canaries. Use safe string functions.