CVE-2021-21266

Vulnerability Description

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 Score

Affected Products

Related Weaknesses (CWE)

References

• https://dev.to/brianverm/configure-your-java-xml-parsers-to-prevent-xxe-213cThird Party Advisory
• https://github.com/openhab/openhab-addons/commit/81935b0ab126e6d9aebd2f6c3fc67d8PatchThird Party Advisory
• https://github.com/openhab/openhab-addons/security/advisories/GHSA-r2hc-pmr7-4c9PatchThird Party Advisory
• https://www.contrastsecurity.com/security-influencers/xml-xxe-pitfalls-with-jaxbTechnical DescriptionThird Party Advisory
• https://dev.to/brianverm/configure-your-java-xml-parsers-to-prevent-xxe-213cThird Party Advisory
• https://github.com/openhab/openhab-addons/commit/81935b0ab126e6d9aebd2f6c3fc67d8PatchThird Party Advisory
• https://github.com/openhab/openhab-addons/security/advisories/GHSA-r2hc-pmr7-4c9PatchThird Party Advisory
• https://www.contrastsecurity.com/security-influencers/xml-xxe-pitfalls-with-jaxbTechnical DescriptionThird Party Advisory