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CVE-2021-21266— XXE vulnerability in OpenHAB

Quick assessment

Affected
openhab openhab-addons
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

openHAB before versions 2.5.12 and 3.0.1 存在安全漏洞，攻击者可利用该漏洞从文件系统中检索内部信息。

CVSS 6.4 · Medium EPSS 1.10% · P65
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I. Basic Information for CVE-2021-21266

Vulnerability Information
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Vulnerability Title
XXE vulnerability in OpenHAB
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
XML外部实体引用的不恰当限制(XXE)
Source: CVE Program / CVE List V5
Vulnerability Title
openHAB 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
openHAB before versions 2.5.12 and 3.0.1 存在安全漏洞，攻击者可利用该漏洞从文件系统中检索内部信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
openhab openhab-addons < 2.5.12 -

II. Public POCs for CVE-2021-21266

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III. Intelligence Information for CVE-2021-21266

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Patches & Fixes for CVE-2021-21266 (1)

Vendor Advisories for CVE-2021-21266 (1)

Other References for CVE-2021-21266 (2)

IV. Related Vulnerabilities

Same product: openhab-addons
Same vendor: openhab
Same weakness: CWE-611

V. Comments for CVE-2021-21266

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