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.
Vulnerability category: Cross site scripting (XSS)
Exploit prediction scoring system (EPSS) score for CVE-2019-19916
Probability of exploitation activity in the next 30 days: 0.17%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 53 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2019-19916
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:N |
8.6
|
2.9
|
NIST |
6.1
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
2.8
|
2.7
|
NIST |
CWE ids for CVE-2019-19916
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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.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-19916
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https://github.com/V1n1v131r4/MIME-Confusion-Attack-on-Midori-Browser/blob/master/README.md
MIME-Confusion-Attack-on-Midori-Browser/README.md at master · V1n1v131r4/MIME-Confusion-Attack-on-Midori-Browser · GitHubExploit;Third Party Advisory
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https://portswigger.net/research/bypassing-csp-using-polyglot-jpegs
Bypassing CSP using polyglot JPEGs | PortSwigger ResearchExploit;Third Party Advisory
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https://blog.mozilla.org/security/2016/08/26/mitigating-mime-confusion-attacks-in-firefox/
Mitigating MIME Confusion Attacks in Firefox | Mozilla Security BlogThird Party Advisory
Products affected by CVE-2019-19916
- cpe:2.3:a:midori-browser:midori:0.5.11:*:*:*:*:*:*:*