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.
Published 2018-06-11 21:29:11
Updated 2019-10-03 00:03:26
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2017-7813

0.28%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 65 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2017-7813

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
6.4
MEDIUM AV:N/AC:L/Au:N/C:P/I:N/A:P
10.0
4.9
NIST
8.2
HIGH CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
3.9
4.2
NIST

CWE ids for CVE-2017-7813

  • The product reads data past the end, or before the beginning, of the intended buffer.
    Assigned by: nvd@nist.gov (Primary)
  • The product does not correctly convert an object, resource, or structure from one type to a different type.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2017-7813

Products affected by CVE-2017-7813

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