Vulnerability Monitor

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CVE-2020-24335

An issue was discovered in uIP through 1.0, as used in Contiki and Contiki-NG. Domain name parsing lacks bounds checks, allowing an attacker to corrupt memory with crafted DNS packets.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 3 products from uip_project, from contiki-ng, from contiki-os organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2021-02-02T07:15:13.833

Last Modified

2026-06-17T03:05:23.393

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-125

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	uip_project	uip	≤ 1.0	Yes
Operating System	contiki-ng	contiki-ng	-	No
Operating System	contiki-os	contiki	-	No

References

https://github.com/adamdunkels/uip Product, Third Party Advisory ([email protected])
https://github.com/contiki-ng/contiki-ng Product, Third Party Advisory ([email protected])
https://github.com/contiki-os/contiki Product, Third Party Advisory ([email protected])
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 Third Party Advisory, US Government Resource ([email protected])
https://www.kb.cert.org/vuls/id/815128 Third Party Advisory, US Government Resource ([email protected])
https://github.com/adamdunkels/uip Product, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/contiki-ng/contiki-ng Product, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/contiki-os/contiki Product, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
https://www.kb.cert.org/vuls/id/815128 Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For uip_project's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.