CVE-2020-24336: Buffer Overflow

Published Dec 11, 2020
·
Updated

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.

Affected Software

10 affected components
Contiki-NG Contiki-NG<=4.5
Contiki-os Contiki<=3.0
Multiple (open source) uIP-Contiki-OS (end-of-life [EOL]), Version 3.0 and prior
Multiple (open source) uIP-Contiki-NG, Version 4.5 and prior
Multiple (open source) uIP (EOL), Version 1.0 and prior
Multiple (open source) open-iscsi, Version 2.1.12 and prior
Multiple (open source) picoTCP-NG, Version 1.7.0 and prior
Multiple (open source) picoTCP (EOL), Version 1.7.0 and prior
Multiple (open source) FNET, Version 4.6.3
Multiple (open source) Nut/Net, Version 5.1 and prior

Event History

Dec 11, 2020
CVE Published
via MITRE·10:43 PM
Data Sourced
via MITRE·10:43 PM
Description

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is CVE-2020-24336?

CVE-2020-24336 is a vulnerability in Contiki and Contiki-NG that can lead to buffer overflow due to improper verification in parsing domain name answers.

2

How severe is CVE-2020-24336?

CVE-2020-24336 has a severity score of 9.8 (Critical).

3

Which software versions are affected by CVE-2020-24336?

Contiki versions up to 3.0 and Contiki-NG versions up to 4.5 are affected by CVE-2020-24336.

4

What is the CWE ID for CVE-2020-24336?

CVE-2020-24336 is associated with the CWE IDs 119 and 120.

5

How can I fix CVE-2020-24336?

To fix CVE-2020-24336, it is recommended to update to a patched version of Contiki or Contiki-NG.

Company

Resources

Contact

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