CVE-2021-21266
openHAB XXE File Retrieval 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.
INFO
Published Date :
Feb. 1, 2021, 3:15 p.m.
Last Modified :
Feb. 5, 2021, 9:38 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
2.7
Exploitability Score :
3.1
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-21266.
| URL | 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-21266 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-21266 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Feb. 05, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N Changed Reference Type https://dev.to/brianverm/configure-your-java-xml-parsers-to-prevent-xxe-213c No Types Assigned https://dev.to/brianverm/configure-your-java-xml-parsers-to-prevent-xxe-213c Third Party Advisory Changed Reference Type https://github.com/openhab/openhab-addons/commit/81935b0ab126e6d9aebd2f6c3fc67d82bb7e8b86 No Types Assigned https://github.com/openhab/openhab-addons/commit/81935b0ab126e6d9aebd2f6c3fc67d82bb7e8b86 Patch, Third Party Advisory Changed Reference Type https://github.com/openhab/openhab-addons/security/advisories/GHSA-r2hc-pmr7-4c9r No Types Assigned https://github.com/openhab/openhab-addons/security/advisories/GHSA-r2hc-pmr7-4c9r Patch, Third Party Advisory Changed Reference Type https://www.contrastsecurity.com/security-influencers/xml-xxe-pitfalls-with-jaxb No Types Assigned https://www.contrastsecurity.com/security-influencers/xml-xxe-pitfalls-with-jaxb Technical Description, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:openhab:openhab:*:*:*:*:*:*:*:* versions up to (excluding) 2.5.12 *cpe:2.3:a:openhab:openhab:3.0.0:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-21266 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-21266
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.12 }} 0.00%
score
0.44892
percentile