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CVE-2020-8621

Attempting QNAME minimization after forwarding can lead to an assertion failure in resolver.c

Published: Aug 21, 2020Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-617
NVD MITRE
7.5CVSSHIGH
EPSS Score
2.9%
Top 14.7%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
Patch Available

Description

In BIND 9.14.0 -> 9.16.5, 9.17.0 -> 9.17.3, If a server is configured with both QNAME minimization and 'forward first' then an attacker who can send queries to it may be able to trigger the condition that will cause the server to crash. Servers that 'forward only' are not affected.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-617

Affected Products

bindiscNetworking Infrastructure
leapopensuse
On-premOS
Operating Systems / linux-distro
ubuntu linuxcanonical
On-premOS
Operating Systems / linux-distro
dns serversynology
On-prem
Operating Systems / linux-distro
steelstore cloud integrated storagenetappHardware Firmware
isccommercialUSNetworking Infrastructureaka internet systems consortium
opensuseoss-projectDEOperating Systemsaka opensuse
canonicalcommercialGBOperating Systemsaka canonical ltd.
synologycommercialUSOperating Systemsaka diskstation manager (dsm), router manager
netappcommercialUSHardware Firmware
and 4 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
Workaround Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html
lists.opensuse.org
https://kb.isc.org/docs/cve-2020-8621
kb.isc.org
and 5 more references View all →

Timeline

Published
Aug 21, 2020
Last Updated
Nov 21, 2024

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