VulnerabilityModified
CVE-2020-19861
When the memcpy is copied, the 0xfe - ldns_rdf_size(salt_rdf) byte data can be copied, causing heap overflow information leakage.
HIGH 7.5EPSS 1.49%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.49%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 1.49% probability · 73th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- nlnetlabs/ldns
- Source
- cve@mitre.org
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.