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CVE-2020-17437

8.2 · HIGH

An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products.

Published Dec 11, 2020CWE-787EPSS 2.81%

Overview

CVE-2020-17437 is a high-severity vulnerability. It was published on December 11, 2020 and has a CVSS 3.1 base score of 8.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. When the Urgent flag is set in a TCP packet, and the stack is configured to ignore the urgent data, the stack attempts to use the value of the Urgent pointer bytes to separate the Urgent data from the normal data, by calculating the offset at which the normal data should be present in the global buffer. However, the length of this offset is not checked; therefore, for large values of the Urgent pointer bytes, the data pointer can point to memory that is way beyond the data buffer in uip_process in uip.c.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refcert-portal.siemens.com/productcert/pdf/ssa-541018.pdfCISAus-cert.cisa.gov/ics/advisories/icsa-20-343-01Refwww.kb.cert.org/vuls/id/815128Refcert-portal.siemens.com/productcert/pdf/ssa-541018.pdfCISAus-cert.cisa.gov/ics/advisories/icsa-20-343-01Refwww.kb.cert.org/vuls/id/815128

How CyberStrike helps

Frequently asked questions

What is CVE-2020-17437?

CVE-2020-17437 is a high-severity vulnerability. It was published on December 11, 2020 and has a CVSS 3.1 base score of 8.2 (HIGH).

How severe is CVE-2020-17437?

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-17437?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-17437?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-17437 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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