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CVE-2021-25218

A too-strict assertion check could be triggered when responses in BIND 9.16.19 and 9.17.16 require UDP fragmentation if RRL is in use

Published: Aug 18, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-617
NVD MITRE
7.5CVSSHIGH
EPSS Score
3.6%
Top 12.2%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
Patch Available

Description

In BIND 9.16.19, 9.17.16. Also, version 9.16.19-S1 of BIND Supported Preview Edition When a vulnerable version of named receives a query under the circumstances described above, the named process will terminate due to a failed assertion check. The vulnerability affects only BIND 9 releases 9.16.19, 9.17.16, and release 9.16.19-S1 of the BIND Supported Preview Edition.

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
fedorafedoraproject
On-premOS
Operating Systems / linux-distro
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
BINDInternet Systems Consortium
On-premNetwork Device
Networking Infrastructure / dns-dhcp-ntp
BIND9ISCNetworking Infrastructure
isccommercialUSNetworking Infrastructureaka internet systems consortium
fedoraprojectoss-projectUSOperating Systemsaka fedora project
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
internet systems consortiumoss-projectUSNetworking Infrastructureaka isc

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://www.openwall.com/lists/oss-security/2021/08/18/3
openwall.com
http://www.openwall.com/lists/oss-security/2021/08/20/2
openwall.com
https://kb.isc.org/v1/docs/cve-2021-25218
kb.isc.org
and 5 more references View all →

Timeline

Published
Aug 18, 2021
Last Updated
Nov 21, 2024

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