CVE-2020-17440 Null dereference in n/a
Attackers can cause a denial of service in uIP by sending malformed DNS packets that trigger an invalid pointer dereference during name parsing.
- 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-2020-17440?
CVE-2020-17440 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 domain names present in the DNS responses have '\0' termination. This results in errors when calculating the offset of the pointer that jumps over domain name bytes in DNS response packets when a name lacks this termination, and eventually leads to dereferencing the pointer at an invalid/arbitrary address, within newdata() and parse_name() in resolv.c.
Which versions are affected by CVE-2020-17440?
It affects 1 product.
Products include Uip Project Uip.
How do I fix CVE-2020-17440?
No fix has been published for CVE-2020-17440 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-17440 being exploited?
There is no known exploitation of CVE-2020-17440 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-3jjq-5484-vh7r.