Vulnerability Details : CVE-2017-5384
Potential exploit
Proxy Auto-Config (PAC) files can specify a JavaScript function called for all URL requests with the full URL path which exposes more information than would be sent to the proxy itself in the case of HTTPS. Normally the Proxy Auto-Config file is specified by the user or machine owner and presumed to be non-malicious, but if a user has enabled Web Proxy Auto Detect (WPAD) this file can be served remotely. This vulnerability affects Firefox < 51.
Vulnerability category: Information leak
Products affected by CVE-2017-5384
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-5384
0.14%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 49 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-5384
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:N/A:N |
8.6
|
2.9
|
NIST | |
5.9
|
MEDIUM | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
2.2
|
3.6
|
NIST |
CWE ids for CVE-2017-5384
-
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-5384
-
https://www.mozilla.org/security/advisories/mfsa2017-01/
Security vulnerabilities fixed in Firefox 51 — MozillaVendor Advisory
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https://www.contextis.com//resources/blog/leaking-https-urls-20-year-old-vulnerability/
Sniffing HTTPS URLS with malicious PAC files | Context Information Security UKExploit;Technical Description;Third Party Advisory
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http://www.securitytracker.com/id/1037693
Mozilla Firefox Multiple Bugs Let Remote Users Bypass Security Restrictions, Spoof URLs, Obtain Potentially Sensitive Information, and Execute Arbitrary Code - SecurityTrackerThird Party Advisory;VDB Entry
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https://bugzilla.mozilla.org/show_bug.cgi?id=1255474
1255474 - (CVE-2017-5384) Proxy Auto-Config SSL/TLS Url DisclosureIssue Tracking;Patch;Vendor Advisory
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http://www.securityfocus.com/bid/95763
Mozilla Firefox Multiple Security VulnerabilitiesThird Party Advisory;VDB Entry
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