CVE-2017-5399

Description

Memory safety bugs were reported in Firefox 51. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 52 and Thunderbird < 52.

Category

9.8
CVSS
Severity: Critical
CVSS 3.0 •
CVSS 2.0 •
EPSS 2.94% Top 15%
Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Affected: Mozilla Thunderbird
Published at:
Updated at:

References

Frequently Asked Questions

What is the severity of CVE-2017-5399?
CVE-2017-5399 has been scored as a critical severity vulnerability.
How to fix CVE-2017-5399?
To fix CVE-2017-5399, 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-2017-5399 being actively exploited in the wild?
It is possible that CVE-2017-5399 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-5399?
CVE-2017-5399 affects Mozilla Firefox, Mozilla Thunderbird.
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