CVE-2021-21266 XXE vulnerability in OpenHAB
Attackers on the same network can exploit XXE vulnerabilities in openHAB add-ons to read internal files from the system.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-21266?
CVE-2021-21266 is a medium-severity vulnerability in openhab-addons, published on 1 Feb 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-611
Which versions are affected by CVE-2021-21266?
It affects 1 product.
Products include Openhab Openhab.
How do I fix CVE-2021-21266?
No fix has been published for CVE-2021-21266 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-21266 being exploited?
There is no known exploitation of CVE-2021-21266 in the wild and no public exploit code.
Other vulnerabilities in openhab-addons
Sources
Also known as GHSA-r2hc-pmr7-4c9r.