CVE-2020-19861

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.13%
Third-Party Advisory mitre.org Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/NLnetLabs/ldns/issues/51 issue tracking exploit third party advisory
https://cwe.mitre.org/data/definitions/126.html third party advisory

Frequently Asked Questions

What is the severity of CVE-2020-19861?
CVE-2020-19861 has been scored as a high severity vulnerability.
How to fix CVE-2020-19861?
To fix CVE-2020-19861, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-19861 being actively exploited in the wild?
It is possible that CVE-2020-19861 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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