CVE-2020-19861
7.5
HIGH
CVSS 3.1
EPSS 0.33%
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.
How to fix CVE-2020-19861
No fixed version has been published yet. Mitigate by removing the affected package or applying upstream guidance from the references below.
- Debian/ldns—no fix listed
Is CVE-2020-19861 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |