CVE-2016-5259

High

Description

Use-after-free vulnerability in the CanonicalizeXPCOMParticipant function in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 allows remote attackers to execute arbitrary code via a script that closes its own Service Worker within a nested sync event loop.

SeverityHigh

CVSS8.8

Exploit probability—

Product

Mozilla Firefox

PublishedAug 5, 2016

First seenAug 5, 2016

How to fix

Vendor advisories

security.gentoo.org/glsa/201701-15

Affected products

Product	Affected versions	Fixed in
mozilla firefox	v ≤ 47.0.1, 45.1.0, 45.1.1, 45.2.0, 45.3.0	—
oracle linux	5.0, 6, 7	—

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