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CVE-2020-8622

A truncated TSIG response can lead to an assertion failure

Published: Aug 21, 2020Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-617
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
5.5%
Top 8.2%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
Patch Available

Description

In BIND 9.0.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.9.3-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker on the network path for a TSIG-signed request, or operating the server receiving the TSIG-signed request, could send a truncated response to that request, triggering an assertion failure, causing the server to exit. Alternately, an off-path attacker would have to correctly guess when a TSIG-signed request was sent, along with other characteristics of the packet and message, and spoof a truncated response to trigger an assertion failure, causing the server to exit.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
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 linuxdebian
On-premOS
Operating Systems / linux-distro
ubuntu linuxcanonical
On-premOS
Operating Systems / linux-distro
steelstore cloud integrated storagenetappHardware Firmware
isccommercialUSNetworking Infrastructureaka internet systems consortium
fedoraprojectoss-projectUSOperating Systemsaka fedora project
debianoss-projectGBOperating Systemsaka debian gnu/linux
canonicalcommercialGBOperating Systemsaka canonical ltd.
netappcommercialUSHardware Firmware
and 14 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-2020-8622
kb.isc.org
and 24 more references View all →

Timeline

Published
Aug 21, 2020
Last Updated
Nov 21, 2024

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