CVE-2020-19861
Last modified
CVE-2020-19861 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.49% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nlnetlabs | Ldns | 1.7.1 |
References
- https://cwe.mitre.org/data/definitions/126.htmlThird Party Advisory
- https://github.com/NLnetLabs/ldns/issues/51Exploit, Issue Tracking, Third Party Advisory
- https://cwe.mitre.org/data/definitions/126.htmlThird Party Advisory
- https://github.com/NLnetLabs/ldns/issues/51Exploit, Issue Tracking, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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