Vulnerability Description
An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. The code that parses incoming DNS packets does not validate that the incoming DNS replies match outgoing DNS queries in newdata() in resolv.c. Also, arbitrary DNS replies are parsed if there was any outgoing DNS query with a transaction ID that matches the transaction ID of an incoming reply. Provided that the default DNS cache is quite small (only four records) and that the transaction ID has a very limited set of values that is quite easy to guess, this can lead to DNS cache poisoning.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Uip Project | Uip | 1.0 |
| Contiki-Os | Contiki | 3.0 |
Related Weaknesses (CWE)
References
- https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01Third Party AdvisoryUS Government Resource
- https://www.kb.cert.org/vuls/id/815128Third Party AdvisoryUS Government Resource
- https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01Third Party AdvisoryUS Government Resource
- https://www.kb.cert.org/vuls/id/815128Third Party AdvisoryUS Government Resource
FAQ
What is CVE-2020-17439?
CVE-2020-17439 is a vulnerability with a CVSS score of 8.3 (HIGH). An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. The code that parses incoming DNS packets does not validate that the incoming DNS replies match outgoing DNS queries in n...
How severe is CVE-2020-17439?
CVE-2020-17439 has been rated HIGH with a CVSS base score of 8.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-17439?
Check the references section above for vendor advisories and patch information. Affected products include: Uip Project Uip, Contiki-Os Contiki.