What’s Vulnerable › Vulnerabilities

CVE-2020-19860

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-01-21 · updated 2026-06-17
• Weakness: CWE-125

Description

When ldns version 1.7.1 verifies a zone file, the ldns_rr_new_frm_str_internal function has a heap out of bounds read vulnerability. An attacker can leak information on the heap by constructing a zone file payload.

Affected products

• NLnet Labs ldns: 1.7.1

References

• https://github.com/NLnetLabs/ldns/commit/15d96206996bea969fbc918eb0a4a346f514b9f3
• https://github.com/NLnetLabs/ldns/issues/50
• https://github.com/NLnetLabs/ldns/commit/15d96206996bea969fbc918eb0a4a346f514b9f3
• https://github.com/NLnetLabs/ldns/issues/50

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