CVE-2017-7813 Information

Description

Inside the JavaScript parser a cast of an integer to a narrower type can result in data read from outside the buffer being parsed. This usually results in a non-exploitable crash but can leak a limited amount of information from memory if it matches JavaScript identifier syntax. This vulnerability affects Firefox 56.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Reference

http://www.securityfocus.com/bid/101057 http://www.securitytracker.com/id/1039465 https://bugzilla.mozilla.org/show_bug.cgi?id=1383951 https://www.mozilla.org/security/advisories/mfsa2017-21/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

HIGH

Base Severity

8.2