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CVE-2020-19861

Published: Jan 21, 2022Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-125
7.5HIGH
NVD MITRE
EPSS Score
1.5%
Top 29.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-125

Affected Products

n/an/a
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
Astra Linux Special Edition для «Эльбрус»ООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
LDNSStichting NLnet Labs
On-prem
Networking Infrastructure / dns-dhcp-ntp
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
stichting nlnet labsoss-projectNLNetworking Infrastructureaka unbound, ldns, nsd
and 3 more affected products View all →

Exploitability

Official Patch Available
No detection template yetWe can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://github.com/NLnetLabs/ldns/issues/51
github.com
https://cwe.mitre.org/data/definitions/126.html
cwe.mitre.org
https://github.com/NLnetLabs/ldns/commit/136ec420437041fe13f344a2053e774f9050cc38
github.com
and 9 more references View all →

Timeline

Published
Jan 21, 2022
Last Updated
Nov 21, 2024

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