CVE-2019-19916

Public Exploit

Description

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.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.13%
Third-Party Advisory mozilla.org Third-Party Advisory github.com Third-Party Advisory portswigger.net
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/V1n1v131r4/MIME-Confusion-Attack-on-Midori-Browser/blob/master/README.md third party advisory exploit
https://blog.mozilla.org/security/2016/08/26/mitigating-mime-confusion-attacks-in-firefox/ third party advisory
https://portswigger.net/research/bypassing-csp-using-polyglot-jpegs third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2019-19916?
CVE-2019-19916 has been scored as a medium severity vulnerability.
How to fix CVE-2019-19916?
To fix CVE-2019-19916, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-19916 being actively exploited in the wild?
It is possible that CVE-2019-19916 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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