Vulnerability Details CVE-2019-19916
In Midori Browser 0.5.11 (on Windows 10), Content Security Policy (CSP) is not applied correctly to all parts of multipart content sent with the multipart/x-mixed-replace MIME type. This could result in script running where CSP should have blocked it, allowing for cross-site scripting (XSS) and other attacks when the product renders the content as HTML. Remediating this would also need to consider the polyglot case, e.g., a file that is a valid GIF image and also valid JavaScript.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 53.9%
CVSS Severity
CVSS v3 Score 6.1
CVSS v2 Score 4.3
References
- https://blog.mozilla.org/security/2016/08/26/mitigating-mime-confusion-attacks-in-firefox/
- https://github.com/V1n1v131r4/MIME-Confusion-Attack-on-Midori-Browser/blob/master/README.md
- https://portswigger.net/research/bypassing-csp-using-polyglot-jpegs
- https://blog.mozilla.org/security/2016/08/26/mitigating-mime-confusion-attacks-in-firefox/
- https://github.com/V1n1v131r4/MIME-Confusion-Attack-on-Midori-Browser/blob/master/README.md
- https://portswigger.net/research/bypassing-csp-using-polyglot-jpegs
Products affected by CVE-2019-19916
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cpe:2.3:a:midori-browser:midori:0.5.11
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cpe:2.3:o:microsoft:windows_10:-