Home Assistant up to 0.56 Notification Markdown Persistent cross site scripting

Summaryinfo

A vulnerability classified as problematic was found in Home Assistant up to 0.56. Affected is an unknown function of the component Notification. The manipulation as part of Markdown results in cross site scripting (Persistent). This vulnerability is cataloged as CVE-2017-16782. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Home Assistant up to 0.56. It has been classified as problematic. Affected is an unknown function of the component Notification. The manipulation as part of a Markdown leads to a cross site scripting vulnerability (Persistent). CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

In Home Assistant before 0.57, it is possible to inject JavaScript code into a persistent notification via crafted Markdown text, aka XSS.

The bug was discovered 10/27/2017. The weakness was shared 11/10/2017 (GitHub Repository). The advisory is shared for download at github.com. This vulnerability is traded as CVE-2017-16782 since 11/10/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

The vulnerability was handled as a non-public zero-day exploit for at least 14 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 0.57 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• Home Assistant

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26
• 0.27
• 0.28
• 0.29
• 0.30
• 0.31
• 0.32
• 0.33
• 0.34
• 0.35
• 0.36
• 0.37
• 0.38
• 0.39
• 0.40
• 0.41
• 0.42
• 0.43
• 0.44
• 0.45
• 0.46
• 0.47
• 0.48
• 0.49
• 0.50
• 0.51
• 0.52
• 0.53
• 0.54
• 0.55
• 0.56

CPE 2.3info

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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