---
title: "CVE-2020-24336: An issue was discovered in Contiki… | CubePath"
description: "An issue was discovered in Contiki through 3.0 and Contiki-NG through 4.5. The code for parsing Type A domain name answers in ip64-dns64.c doesn't verify…"
language: en
source: https://cubepath.com/security/cve/CVE-2020-24336
---

# CVE-2020-24336: An issue was discovered in Contiki… | CubePath

## Description

An issue was discovered in Contiki through 3.0 and Contiki-NG through 4.5\. The code for parsing Type A domain name answers in ip64-dns64.c doesn't verify whether the address in the answer's length is sane. Therefore, when copying an address of an arbitrary length, a buffer overflow can occur. This bug can be exploited whenever NAT64 is enabled.

Official description from the CVE record, published by mitre. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2020-24336)

## Key data

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.59089 (59.1% probability)

Percentile

99.1%

Scores of

Nov 10, 2026

Model

v2026.06.15

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [kb.cert.org/vuls/id/815128](https://www.kb.cert.org/vuls/id/815128)
- [us-cert.cisa.gov/ics/advisories/icsa-20-343-01](https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01)

## Timeline

1. ID reserved Aug 13, 2020
2. Record published Dec 11, 2020
3. Record last updated Aug 4, 2024

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:05 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)