CVE-2018-5099

Description

A use-after-free vulnerability can occur when the widget listener is holding strong references to browser objects that have previously been freed, resulting in a potentially exploitable crash when these references are used. This vulnerability affects Thunderbird < 52.6, Firefox ESR < 52.6, and Firefox < 58.

Category

9.8
CVSS
Severity: Critical
CVSS 3.0 •
CVSS 2.0 •
EPSS 2.65% Top 20%
Vendor Advisory debian.org Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory debian.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Thunderbird
Affected: Mozilla Firefox ESR
Affected: Mozilla Firefox
Published at:
Updated at:

References

Link Tags
https://www.mozilla.org/security/advisories/mfsa2018-03/ vendor advisory
http://www.securitytracker.com/id/1040270 third party advisory vdb entry
https://lists.debian.org/debian-lts-announce/2018/01/msg00036.html third party advisory mailing list
http://www.securityfocus.com/bid/102783 third party advisory vdb entry
https://www.debian.org/security/2018/dsa-4096 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2018:0262 third party advisory vendor advisory
https://usn.ubuntu.com/3544-1/ third party advisory vendor advisory
https://www.mozilla.org/security/advisories/mfsa2018-04/ vendor advisory
https://access.redhat.com/errata/RHSA-2018:0122 third party advisory vendor advisory
https://www.mozilla.org/security/advisories/mfsa2018-02/ vendor advisory
https://lists.debian.org/debian-lts-announce/2018/01/msg00030.html third party advisory mailing list
https://bugzilla.mozilla.org/show_bug.cgi?id=1416878 third party advisory issue tracking permissions required
https://www.debian.org/security/2018/dsa-4102 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2018-5099?
CVE-2018-5099 has been scored as a critical severity vulnerability.
How to fix CVE-2018-5099?
To fix CVE-2018-5099, 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-2018-5099 being actively exploited in the wild?
It is possible that CVE-2018-5099 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-2018-5099?
CVE-2018-5099 affects Mozilla Thunderbird, Mozilla Firefox ESR, Mozilla Firefox.
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