JavaScript Parser Integer Cast Vulnerability in Firefox < 56

CVE-2017-7813 · MEDIUM Severity

AV:N/AC:L/AU:N/C:P/I:N/A:P

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.

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