Out-of-bounds Read in Apple Mac OS X

CVE-2018-4256

In macOS High Sierra before 10.13.5, an out-of-bounds read was addressed with improved input validation.

Vulnerability class: Buffer Overflow

EPSS: 0.003 (21.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Apple Mac_os_x
N/a — versions n/a

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

product-security@apple.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2018-4256?: CVE-2018-4256 is a medium-severity vulnerability in Apple Mac OS X, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2019-01-11.
How severe is CVE-2018-4256?: Medium severity. CVSS v3 base score is 5.5 out of 10.