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CVE-2016-5270

Published: 22 September 2016

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.

Priority

Medium

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
upstream
Released (49.0)
precise
Released (49.0+build4-0ubuntu0.12.04.1)
xenial
Released (49.0+build4-0ubuntu0.16.04.1)
yakkety
Released (49.0+build4-0ubuntu2)
trusty
Released (49.0+build4-0ubuntu0.14.04.1)
thunderbird
Launchpad, Ubuntu, Debian
upstream
Released (45.4.0)
precise
Released (1:45.4.0+build1-0ubuntu0.12.04.1)
xenial
Released (1:45.4.0+build1-0ubuntu0.16.04.1)
yakkety
Released (1:45.4.0+build1-0ubuntu0.16.10.1)
trusty
Released (1:45.4.0+build1-0ubuntu0.14.04.1)

Severity score breakdown

Parameter Value
Base score 9.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H