CVE-2019-25041 Denial of service in n/a
A flaw in Unbound DNS resolver could cause an assertion failure and service crash via crafted compressed names, though vendor disputes remote exploitability.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-25041?
CVE-2019-25041 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 27 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Unbound before 1.9.5 allows an assertion failure via a compressed name in dname_pkt_copy. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, a running Unbound installation cannot be remotely or locally exploited
Weakness: CWE-617
Which versions are affected by CVE-2019-25041?
It affects 2 products.
Products include Debian Debian Linux, Nlnetlabs Unbound.
How do I fix CVE-2019-25041?
Upgrade to a fixed version.
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-2019-25041 being exploited?
There is no known exploitation of CVE-2019-25041 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2019-25041, GHSA-48rg-6m8g-cqgc, UBUNTU-CVE-2019-25041.