CVE-2020-25767 Denial of service in n/a
Attackers can cause a denial of service in HCC Embedded NicheStack IPv4 by sending crafted DNS packets with invalid compression pointers.
- 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-2020-25767?
CVE-2020-25767 is a high-severity denial of service vulnerability in n/a, published on 18 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in HCC Embedded NicheStack IPv4 4.1. The dnc_copy_in routine for parsing DNS domain names does not check whether a domain name compression pointer is pointing within the bounds of the packet (e.g., forward compression pointer jumps are allowed), which leads to an Out-of-bounds Read, and a Denial-of-Service as a consequence.
Weakness: CWE-125
Which versions are affected by CVE-2020-25767?
It affects 1 product.
Products include Hcc-Embedded Nichestack Ipv4.
How do I fix CVE-2020-25767?
No fix has been published for CVE-2020-25767 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-25767 being exploited?
There is no known exploitation of CVE-2020-25767 in the wild and no public exploit code.
Sources
Also known as GHSA-2hg5-gxv6-8v58.