Out-of-bounds Read in Mozilla Firefox

CVE-2017-7776

Heap-based Buffer Overflow read in Graphite2 library in Firefox before 54 in graphite2::Silf::getClassGlyph.

Vulnerability class: Buffer Overflow

EPSS: 0.028 (84.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H.

Affected products

Mozilla Firefox — versions All versions prior to Firefox 54
Sil Graphite2

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

security@mozilla.org (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2017-7776?: CVE-2017-7776 is a high-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Read. CVSS score: 8.1/10. Published 2019-04-15.
How severe is CVE-2017-7776?: High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2017-7776 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.