PT-2021-23149 · Grafana+2 · Grafana+2
Dsotirakis
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Published
2021-11-03
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Updated
2024-06-15
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CVE-2021-41174
CVSS v3.1
6.9
Medium
| Vector | AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:H/A:N |
Name of the Vulnerable Software and Affected Versions
Grafana (affected versions not specified)
Description
Grafana is an open-source platform for monitoring and observability. In affected versions, if an attacker is able to convince a victim to visit a URL referencing a vulnerable page, arbitrary JavaScript content may be executed within the context of the victim's browser. The user visiting the malicious link must be unauthenticated and the link must be for a page that contains the login button in the menu bar. The URL has to be crafted to exploit AngularJS rendering and contain the interpolation binding for AngularJS expressions, using double curly braces for interpolation binding:
{{ }}. For example, {{constructor.constructor('alert(1)')()}}. When the user follows the link and the page renders, the login button will contain the original link with a query parameter to force a redirect to the login page. The URL is not validated and the AngularJS rendering engine will execute the JavaScript expression contained in the URL.Recommendations
If for some reason you cannot upgrade, you can use a reverse proxy or similar to block access to block the literal string
{{ in the path.
At the moment, there is no information about a newer version that contains a fix for this vulnerability.Exploit
XSS
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Grafana
Suse