CVE-2020-17439 Other in n/a
Attackers can poison the DNS cache in uIP by sending spoofed replies, leading to traffic redirection or data modification.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-17439?
CVE-2020-17439 is a high-severity vulnerability in n/a, published on 11 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-20
Which versions are affected by CVE-2020-17439?
It affects 1 product.
Products include Uip Project Uip.
How do I fix CVE-2020-17439?
No fix has been published for CVE-2020-17439 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-17439 being exploited?
There is no known exploitation of CVE-2020-17439 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-5xvj-fmm7-pv9c.