CVE-2020-19860 Information disclosure in n/a

Medium 6.5 Published 21 Jan 2022 Updated 4 Aug 2024

An attacker can leak heap memory information by providing a maliciously crafted zone file to the ldns library during verification.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2020-19860?

CVE-2020-19860 is a medium-severity vulnerability in n/a, published on 21 Jan 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

When ldns version 1.7.1 verifies a zone file, the ldns_rr_new_frm_str_internal function has a heap out of bounds read vulnerability. An attacker can leak information on the heap by constructing a zone file payload.

Weakness: CWE-125

Which versions are affected by CVE-2020-19860?

It affects 1 product.

Products include Nlnetlabs Ldns.

How do I fix CVE-2020-19860?

Upgrade to a fixed version.

Is CVE-2020-19860 being exploited?

There is no known exploitation of CVE-2020-19860 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2020-19860, GHSA-x6hf-28q4-37gq, UBUNTU-CVE-2020-19860.