CVE-2017-5397

Description

The cache directory on the local file system is set to be world writable. Firefox defaults to extracting libraries from this cache. This allows for the possibility of an installed malicious application or tools with write access to the file system to replace files used by Firefox with their own versions. This vulnerability affects Firefox < 51.0.3.

Category

9.8
CVSS
Severity: Critical
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.55%
Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Published at:
Updated at:

References

Link Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1337304 issue tracking patch vendor advisory
http://www.securityfocus.com/bid/96144 vdb entry third party advisory
https://www.mozilla.org/security/advisories/mfsa2017-04/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-5397?
CVE-2017-5397 has been scored as a critical severity vulnerability.
How to fix CVE-2017-5397?
To fix CVE-2017-5397, 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-2017-5397 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-5397 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-5397?
CVE-2017-5397 affects Mozilla Firefox.
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