CVE-2016-5270

Critical

Description

Heap-based buffer overflow in the nsCaseTransformTextRunFactory::TransformString function in Mozilla Firefox before 49.0, Firefox ESR 45.x before 45.4, and Thunderbird < 45.4 allows remote attackers to cause a denial of service (boolean out-of-bounds write) or possibly have unspecified other impact via Unicode characters that are mishandled during text conversion.

SeverityCritical

CVSS9.8

Exploit probability—

Product

Mozilla Firefox

PublishedSep 22, 2016

First seenSep 22, 2016

How to fix

Vendor advisories

security.gentoo.org/glsa/201701-15

Affected products

Product	Affected versions	Fixed in
mozilla firefox	v ≤ 48.0.2, 45.1.0, 45.1.1, 45.2.0, 45.3.0	—

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