CVE-2021-22926

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

libcurl-using applications can ask for a specific client certificate to be used in a transfer. This is done with the `CURLOPT_SSLCERT` option (`--cert` with the command line tool).When libcurl is built to use the macOS native TLS library Secure Transport, an application can ask for the client certificate by name or with a file name - using the same option. If the name exists as a file, it will be used instead of by name.If the appliction runs with a current working directory that is writable by other users (like `/tmp`), a malicious user can create a file name with the same name as the app wants to use by name, and thereby trick the application to use the file based cert instead of the one referred to by name making libcurl send the wrong client certificate in the TLS connection handshake.

Las aplicaciones que usan libcurl pueden pedir un certificado de cliente específico para ser usado en una transferencia. Esto se hace con la opción "CURLOPT_SSLCERT" ("--cert" con la herramienta de línea de comandos).Cuando libcurl se construye para usar la biblioteca TLS nativa de macOS Transporte Seguro, una aplicación puede pedir el certificado del cliente por su nombre o con un nombre de archivo - usando la misma opción. Si la aplicación se ejecuta con un directorio de trabajo actual que puede ser escrito por otros usuarios (como "/tmp"), un usuario malintencionado puede crear un nombre de archivo con el mismo nombre que la aplicación quiere usar por nombre, y así engañar a la aplicación para que use el certificado basado en el archivo en lugar del referido por nombre, haciendo que libcurl envíe el certificado de cliente incorrecto en el handshake de la conexión TLS

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-06 CVE Reserved
2021-08-05 CVE Published
2024-04-21 EPSS Updated
2024-08-03 CVE Updated
2024-08-03 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-295: Improper Certificate Validation
CWE-840: Business Logic Errors

CAPEC

References (11)

URL	Tag	Source
https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cdev.kafka.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cusers.kafka.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7%40%3Cdev.kafka.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7%40%3Cusers.kafka.apache.org%3E	Mailing List
https://security.netapp.com/advisory/ntap-20210902-0003	Third Party Advisory
https://security.netapp.com/advisory/ntap-20211022-0003	Third Party Advisory

URL	Date	SRC
https://hackerone.com/reports/1234760	2024-08-03

URL	Date	SRC
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf	2024-03-27
https://www.oracle.com/security-alerts/cpujan2022.html	2024-03-27
https://www.oracle.com/security-alerts/cpuoct2021.html	2024-03-27

URL	Date	SRC
https://security.gentoo.org/glsa/202212-01	2024-03-27

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
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"	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"	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"	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"	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"	H410s Firmware Search vendor "Netapp" for product "H410s Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H410s Search vendor "Netapp" for product "H410s"	-	-	Safe
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				>= 7.33.0 < 7.78.0 Search vendor "Haxx" for product "Curl" and version " >= 7.33.0 < 7.78.0"		-		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"		Active Iq Unified Manager Search vendor "Netapp" for product "Active Iq Unified Manager"				-		windows		Affected
Netapp Search vendor "Netapp"		Clustered Data Ontap Search vendor "Netapp" for product "Clustered Data Ontap"				-		-		Affected
Netapp Search vendor "Netapp"		Hci Management Node Search vendor "Netapp" for product "Hci Management Node"				-		-		Affected
Netapp Search vendor "Netapp"		Oncommand Insight Search vendor "Netapp" for product "Oncommand Insight"				-		-		Affected
Netapp Search vendor "Netapp"		Oncommand Workflow Automation Search vendor "Netapp" for product "Oncommand Workflow Automation"				-		-		Affected
Netapp Search vendor "Netapp"		Snapcenter Search vendor "Netapp" for product "Snapcenter"				-		-		Affected
Netapp Search vendor "Netapp"		Solidfire Search vendor "Netapp" for product "Solidfire"				-		-		Affected
Oracle Search vendor "Oracle"		Mysql Server Search vendor "Oracle" for product "Mysql Server"				>= 5.7.0 <= 5.7.35 Search vendor "Oracle" for product "Mysql Server" and version " >= 5.7.0 <= 5.7.35"		-		Affected
Oracle Search vendor "Oracle"		Mysql Server Search vendor "Oracle" for product "Mysql Server"				>= 8.0.0 <= 8.0.26 Search vendor "Oracle" for product "Mysql Server" and version " >= 8.0.0 <= 8.0.26"		-		Affected
Oracle Search vendor "Oracle"		Peoplesoft Enterprise Peopletools Search vendor "Oracle" for product "Peoplesoft Enterprise Peopletools"				8.57 Search vendor "Oracle" for product "Peoplesoft Enterprise Peopletools" and version "8.57"		-		Affected
Oracle Search vendor "Oracle"		Peoplesoft Enterprise Peopletools Search vendor "Oracle" for product "Peoplesoft Enterprise Peopletools"				8.58 Search vendor "Oracle" for product "Peoplesoft Enterprise Peopletools" and version "8.58"		-		Affected
Oracle Search vendor "Oracle"		Peoplesoft Enterprise Peopletools Search vendor "Oracle" for product "Peoplesoft Enterprise Peopletools"				8.59 Search vendor "Oracle" for product "Peoplesoft Enterprise Peopletools" and version "8.59"		-		Affected
Siemens Search vendor "Siemens"		Sinec Infrastructure Network Services Search vendor "Siemens" for product "Sinec Infrastructure Network Services"				< 1.0.1.1 Search vendor "Siemens" for product "Sinec Infrastructure Network Services" and version " < 1.0.1.1"		-		Affected
Splunk Search vendor "Splunk"		Universal Forwarder Search vendor "Splunk" for product "Universal Forwarder"				>= 8.2.0 < 8.2.12 Search vendor "Splunk" for product "Universal Forwarder" and version " >= 8.2.0 < 8.2.12"		-		Affected
Splunk Search vendor "Splunk"		Universal Forwarder Search vendor "Splunk" for product "Universal Forwarder"				>= 9.0.0 < 9.0.6 Search vendor "Splunk" for product "Universal Forwarder" and version " >= 9.0.0 < 9.0.6"		-		Affected
Splunk Search vendor "Splunk"		Universal Forwarder Search vendor "Splunk" for product "Universal Forwarder"				9.1.0 Search vendor "Splunk" for product "Universal Forwarder" and version "9.1.0"		-		Affected