Vulnerability · Published Jan 21, 2022 · Assigned by mitre
CVE-2020-19861
High 7.5
In plain English
A high-severity security flaw in the ldns package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 74% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.5%top 25.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | ldns | 1.8.1-1 | DEBIAN-CVE-2020-19861 |
| Debian:13 | ldns | 1.8.1-1 | DEBIAN-CVE-2020-19861 |
| Debian:14 | ldns | 1.8.1-1 | DEBIAN-CVE-2020-19861 |
Affected products (as reported)
References
- https://github.com/NLnetLabs/ldns/issues/51 x_refsource_MISC
- https://cwe.mitre.org/data/definitions/126.html x_refsource_MISC