Out-of-bounds Read in Apple Mac OS X

CVE-2018-4255

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

Vulnerability class: Buffer Overflow

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.003 (19.7th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 19.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2018-4255: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2018-4255?
CVE-2018-4255 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-2018-4255?
Medium severity. CVSS v3 base score is 5.5 out of 10.