Medium severity · published Jan 21, 2022
CVE-2020-19860
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
6.5
CVSS
1.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 68% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LD
Ldns · Nlnetlabs
1.7.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-19860
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-19860
Patch
https://github.com/NLnetLabs/ldns/commit/15d96206996bea969fbc918eb0a4a346f514b9f3
Exploit
https://github.com/NLnetLabs/ldns/issues/50
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