CVE-2017-7844

Description

A combination of an external SVG image referenced on a page and the coloring of anchor links stored within this image can be used to determine which pages a user has in their history. This can allow a malicious website to query user history. Note: This issue only affects Firefox 57. Earlier releases are not affected. This vulnerability affects Firefox < 57.0.1.

Category

6.5
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.61% Top 20%
Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Published at:
Updated at:

References

Link Tags
http://www.securitytracker.com/id/1039954 vdb entry third party advisory
https://www.mozilla.org/security/advisories/mfsa2017-27/ vendor advisory
http://www.securityfocus.com/bid/102039 vdb entry third party advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1420001 issue tracking permissions required third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-7844?
CVE-2017-7844 has been scored as a medium severity vulnerability.
How to fix CVE-2017-7844?
To fix CVE-2017-7844, 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-2017-7844 being actively exploited in the wild?
It is possible that CVE-2017-7844 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-7844?
CVE-2017-7844 affects Mozilla Firefox.
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