Out-of-bounds Read Affecting ldns package, versions <1.7.0-1+deb9u1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.34% (72nd percentile)

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  • Snyk IDSNYK-DEBIAN9-LDNS-2359224
  • published24 Jan 2022
  • disclosed21 Jan 2022

Introduced: 21 Jan 2022

CVE-2020-19861  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Debian:9 ldns to version 1.7.0-1+deb9u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ldns package and not the ldns package as distributed by Debian. See How to fix? for Debian:9 relevant fixed versions and status.

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 Scores

version 3.1