CVE-2021-20322

kernel: new DNS Cache Poisoning Attack based on ICMP fragment needed packets replies

Severity Score

7.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A flaw in the processing of received ICMP errors (ICMP fragment needed and ICMP redirect) in the Linux kernel functionality was found to allow the ability to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypass the source port UDP randomization. The highest threat from this vulnerability is to confidentiality and possibly integrity, because software that relies on UDP source port randomization are indirectly affected as well.

Se encontró un fallo en el procesamiento de los errores ICMP recibidos (fragmento ICMP necesario y redireccionamiento ICMP) en la funcionalidad del kernel de Linux que permite la capacidad de escanear rápidamente los puertos UDP abiertos. Este fallo permite a un usuario remoto fuera de la ruta de acceso omitir efectivamente la aleatorización del puerto de origen UDP. La mayor amenaza de esta vulnerabilidad es la confidencialidad y posiblemente la integridad, porque el software que depende de la aleatorización del puerto de origen UDP también está afectado indirectamente

*Credits: N/A

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-12-17 CVE Reserved
2022-02-03 CVE Published
2024-08-03 CVE Updated
2024-08-29 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-330: Use of Insufficiently Random Values

CAPEC

References (10)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html	Mailing List
https://security.netapp.com/advisory/ntap-20220303-0002	Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v5.15-rc6&id=4785305c05b25a242e5314cc821f54ade4c18810	2023-11-09
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v5.15-rc6&id=6457378fe796815c973f631a1904e147d6ee33b1	2023-11-09
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/ipv4/route.c?h=v5.15-rc6&id=67d6d681e15b578c1725bad8ad079e05d1c48a8e	2023-11-09
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/ipv6/route.c?h=v5.15-rc6&id=a00df2caffed3883c341d5685f830434312e4a43	2023-11-09

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=2014230	2022-05-31
https://www.debian.org/security/2022/dsa-5096	2023-11-09
https://access.redhat.com/security/cve/CVE-2021-20322	2022-05-31

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Netapp Search vendor "Netapp"	Fas Baseboard Management Controller Firmware Search vendor "Netapp" for product "Fas Baseboard Management Controller Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	Fas Baseboard Management Controller Search vendor "Netapp" for product "Fas Baseboard Management Controller"	8300 Search vendor "Netapp" for product "Fas Baseboard Management Controller" and version "8300"	-	Safe
Netapp Search vendor "Netapp"	Fas Baseboard Management Controller Firmware Search vendor "Netapp" for product "Fas Baseboard Management Controller Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	Fas Baseboard Management Controller Search vendor "Netapp" for product "Fas Baseboard Management Controller"	8700 Search vendor "Netapp" for product "Fas Baseboard Management Controller" and version "8700"	-	Safe
Netapp Search vendor "Netapp"	Aff Baseboard Management Controller Firmware Search vendor "Netapp" for product "Aff Baseboard Management Controller Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	Aff Baseboard Management Controller Search vendor "Netapp" for product "Aff Baseboard Management Controller"	a400 Search vendor "Netapp" for product "Aff Baseboard Management Controller" and version "a400"	-	Safe
Netapp Search vendor "Netapp"	Aff A700s Firmware Search vendor "Netapp" for product "Aff A700s Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	Aff A700s Search vendor "Netapp" for product "Aff A700s"	-	-	Safe
Netapp Search vendor "Netapp"	H700s Firmware Search vendor "Netapp" for product "H700s Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H700s Search vendor "Netapp" for product "H700s"	-	-	Safe
Netapp Search vendor "Netapp"	H700e Firmware Search vendor "Netapp" for product "H700e Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H700e Search vendor "Netapp" for product "H700e"	-	-	Safe
Netapp Search vendor "Netapp"	H500s Firmware Search vendor "Netapp" for product "H500s Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H500s Search vendor "Netapp" for product "H500s"	-	-	Safe
Netapp Search vendor "Netapp"	H410s Firmware Search vendor "Netapp" for product "H410s Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H410s Search vendor "Netapp" for product "H410s"	-	-	Safe
Netapp Search vendor "Netapp"	H500e Firmware Search vendor "Netapp" for product "H500e Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H500e Search vendor "Netapp" for product "H500e"	-	-	Safe
Netapp Search vendor "Netapp"	H300e Firmware Search vendor "Netapp" for product "H300e Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H300e Search vendor "Netapp" for product "H300e"	-	-	Safe
Netapp Search vendor "Netapp"	H300s Firmware Search vendor "Netapp" for product "H300s Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H300s Search vendor "Netapp" for product "H300s"	-	-	Safe
Netapp Search vendor "Netapp"	Hci Compute Node Firmware Search vendor "Netapp" for product "Hci Compute Node Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	Hci Compute Node Search vendor "Netapp" for product "Hci Compute Node"	-	-	Safe
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				<= 5.14.21 Search vendor "Linux" for product "Linux Kernel" and version " <= 5.14.21"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Netapp Search vendor "Netapp"		Active Iq Unified Manager Search vendor "Netapp" for product "Active Iq Unified Manager"				-		vmware_vsphere		Affected
Netapp Search vendor "Netapp"		E-series Santricity Os Controller Search vendor "Netapp" for product "E-series Santricity Os Controller"				>= 11.0 <= 11.70.1 Search vendor "Netapp" for product "E-series Santricity Os Controller" and version " >= 11.0 <= 11.70.1"		-		Affected
Netapp Search vendor "Netapp"		Solidfire\, Enterprise Sds \& Hci Storage Node Search vendor "Netapp" for product "Solidfire\, Enterprise Sds \& Hci Storage Node"				-		-		Affected
Netapp Search vendor "Netapp"		Solidfire \& Hci Management Node Search vendor "Netapp" for product "Solidfire \& Hci Management Node"				-		-		Affected
Oracle Search vendor "Oracle"		Communications Cloud Native Core Binding Support Function Search vendor "Oracle" for product "Communications Cloud Native Core Binding Support Function"				22.1.3 Search vendor "Oracle" for product "Communications Cloud Native Core Binding Support Function" and version "22.1.3"		-		Affected
Oracle Search vendor "Oracle"		Communications Cloud Native Core Network Exposure Function Search vendor "Oracle" for product "Communications Cloud Native Core Network Exposure Function"				22.1.1 Search vendor "Oracle" for product "Communications Cloud Native Core Network Exposure Function" and version "22.1.1"		-		Affected
Oracle Search vendor "Oracle"		Communications Cloud Native Core Policy Search vendor "Oracle" for product "Communications Cloud Native Core Policy"				22.2.0 Search vendor "Oracle" for product "Communications Cloud Native Core Policy" and version "22.2.0"		-		Affected