CVE-2020-19861 Information disclosure in n/a
A heap overflow in ldns allows attackers to leak sensitive memory information by parsing a maliciously crafted zone file.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-19861?
CVE-2020-19861 is a high-severity vulnerability in n/a, published on 21 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
When a zone file in ldns 1.7.1 is parsed, the function ldns_nsec3_salt_data is too trusted for the length value obtained from the zone file. When the memcpy is copied, the 0xfe - ldns_rdf_size(salt_rdf) byte data can be copied, causing heap overflow information leakage.
Weakness: CWE-125
Which versions are affected by CVE-2020-19861?
It affects 1 product.
Products include Nlnetlabs Ldns.
How do I fix CVE-2020-19861?
Upgrade to a fixed version.
Is CVE-2020-19861 being exploited?
There is no known exploitation of CVE-2020-19861 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2020-19861, GHSA-fhv5-v23r-vj74, UBUNTU-CVE-2020-19861.