Out-of-bounds Read in Nlnetlabs Ldns
CVE-2020-19861
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 hea…
Vulnerability class: Buffer Overflow
EPSS: 0.015 (71.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Nlnetlabs Ldns — versions 1.7.1
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-19861?
- CVE-2020-19861 is a high-severity vulnerability in Nlnetlabs Ldns, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2022-01-21.
- How severe is CVE-2020-19861?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-19861 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.