CVE-2020-24336: Buffer Overflow
First published: Fri 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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Contiki-ng Contiki-ng | <=4.5 | |
| Contiki-os Contiki | <=3.0 | |
| 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 |
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Reference Links
Frequently Asked Questions
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.
How severe is CVE-2020-24336?
CVE-2020-24336 has a severity score of 9.8 (Critical).
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.
What is the CWE ID for CVE-2020-24336?
CVE-2020-24336 is associated with the CWE IDs 119 and 120.
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.
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- vendor/contiki-ng
- canonical/contiki-ng contiki-ng
- version/contiki-ng contiki-ng/4.5
- vendor/contiki-os
- canonical/contiki-os contiki
- version/contiki-os contiki/3.0
- vendor/multiple (open source)
- canonical/multiple (open source) picotcp-ng, version 1.7.0 and prior
- canonical/multiple (open source) picotcp (eol), version 1.7.0 and prior
- canonical/multiple (open source) fnet, version 4.6.3
- canonical/multiple (open source) nut/net, version 5.1 and prior