CVE-2021-21266

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.

CVSS v3 5.0 MEDIUM
CVSS v2.0 4.0 MEDIUM

5.0^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.1 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

4.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:S/C:P/I:N/A:N

Exploitability : 8.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://dev.to/brianverm/configure-your-java-xml-parsers-to-prevent-xxe-213c	Third Party Advisory
https://github.com/openhab/openhab-addons/commit/81935b0ab126e6d9aebd2f6c3fc67d82bb7e8b86	Patch Third Party Advisory
https://github.com/openhab/openhab-addons/security/advisories/GHSA-r2hc-pmr7-4c9r	Patch Third Party Advisory
https://www.contrastsecurity.com/security-influencers/xml-xxe-pitfalls-with-jaxb	Technical Description Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:openhab:openhab::::::::
	cpe:2.3:a:openhab:openhab:3.0.0:::::::*

History

No history.

Information

Published : 2021-02-01 15:15

Updated : 2024-02-28 18:08

NVD link : CVE-2021-21266

Mitre link : CVE-2021-21266

CVE.ORG link : CVE-2021-21266

JSON object : View

Products Affected

openhab

openhab

CWE

CWE-611

Improper Restriction of XML External Entity Reference

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