CVE-2021-21266

XXE vulnerability in OpenHAB

Severity Score

5.0

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

openHAB is a vendor and technology agnostic open source automation software for your home. In openHAB before versions 2.5.12 and 3.0.1 the XML external entity (XXE) attack allows attackers in the same network as the openHAB instance to retrieve internal information like the content of files from the file system. Responses to SSDP requests can be especially malicious. All add-ons that use SAX or JAXB parsing of externally received XML are potentially subject to this kind of attack. In openHAB, the following add-ons are potentially impacted: AvmFritz, BoseSoundtouch, DenonMarantz, DLinkSmarthome, Enigma2, FmiWeather, FSInternetRadio, Gce, Homematic, HPPrinter, IHC, Insteon, Onkyo, Roku, SamsungTV, Sonos, Roku, Tellstick, TR064, UPnPControl, Vitotronic, Wemo, YamahaReceiver and XPath Tranformation. The vulnerabilities have been fixed in versions 2.5.12 and 3.0.1 by a more strict configuration of the used XML parser.

openHAB es un proveedor y software de automatización de código abierto de tecnología agnóstica para su hogar.  En openHAB anterior a las versiones 2.5.12 y 3.0.1, el ataque de tipo XML external entity (XXE) permite a atacantes en la misma red que la instancia de openHAB recupere información interna como el contenido de archivos del sistema de archivos. Las respuestas a las peticiones SSDP pueden ser especialmente maliciosas. Todos los add-ons que usan el análisis SAX o JAXB de XML recibido externamente están potencialmente sujetos a este tipo de ataque. En openHAB, los siguientes add-ons pueden estar afectados: AvmFritz, BoseSoundtouch, DenonMarantz, DLinkSmarthome, Enigma2, FmiWeather, FSInternetRadio, Gce, Homematic, HPPrinter, IHC, Insteon, Onkyo, Roku, SamsungTV, Sonos, Roku, TR064 UPnPControl, Vitotronic, Wemo, YamahaReceiver y XPath Tranformation. Las vulnerabilidades han sido corregidas en las versiones 2.5.12 y 3.0.1 mediante una configuración más estricta del analizador XML utilizado

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-12-22 CVE Reserved
2021-02-01 CVE Published
2023-03-07 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-611: Improper Restriction of XML External Entity Reference

CAPEC

References (4)

URL	Tag	Source
https://dev.to/brianverm/configure-your-java-xml-parsers-to-prevent-xxe-213c	Third Party Advisory
https://www.contrastsecurity.com/security-influencers/xml-xxe-pitfalls-with-jaxb	Technical Description

URL	Date	SRC

URL	Date	SRC
https://github.com/openhab/openhab-addons/commit/81935b0ab126e6d9aebd2f6c3fc67d82bb7e8b86	2021-02-05
https://github.com/openhab/openhab-addons/security/advisories/GHSA-r2hc-pmr7-4c9r	2021-02-05

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Openhab Search vendor "Openhab"		Openhab Search vendor "Openhab" for product "Openhab"				< 2.5.12 Search vendor "Openhab" for product "Openhab" and version " < 2.5.12"		-		Affected
Openhab Search vendor "Openhab"		Openhab Search vendor "Openhab" for product "Openhab"				3.0.0 Search vendor "Openhab" for product "Openhab" and version "3.0.0"		-		Affected