CVE-2017-7778

A number of security vulnerabilities in the Graphite 2 library including out-of-bounds reads, buffer overflow reads and writes, and the use of uninitialized memory. These issues were addressed in Graphite 2 version 1.3.10. This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.

Published: 2018-06-11 Last update: 2025-11-25 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-7778 is rated High Risk (67.8/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.43%). High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2017-7778

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-17 1.12% 1.43% +0.32%
2 2025-11-21 6.22% 1.12% -5.10%
3 2025-11-18 — 6.22% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-7778

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2017-7778

OS Trackers for CVE-2017-7778

vendor priority summary link
debian not yet assigned CVE-2017-7778 not yet assigned priority: Debian including 3 source packages (firefox, firefox-esr, graphite2), 11 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 11. https://security-tracker.debian.org/tracker/CVE-2017-7778
gentoo high CVE-2017-7778: 2 GLSA(s) (201710-13, 201802-03), 3 atom(s) (media-gfx/graphite2, www-client/firefox, www-client/firefox-bin); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2017-7778
redhat high — https://access.redhat.com/security/cve/CVE-2017-7778
suse high CVE-2017-7778 severity important: SUSE including 105 source package names (MozillaFirefox, MozillaFirefox-102.11.0-150200.152.87.1, …), 236 product×package rows across 61 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 6, … (61 product lines)): Fixed 202, Known Not Affected 34. https://www.suse.com/security/cve/CVE-2017-7778/
ubuntu medium CVE-2017-7778 medium priority: Ubuntu including 3 source packages (firefox, graphite2, thunderbird), 15 status rows across 5 suites (trusty, upstream, xenial, yakkety, zesty): released 14, ignored 1. https://ubuntu.com/security/CVE-2017-7778

Affected software / configurations for CVE-2017-7778

Vendor Product Version Raw CPE
mozilla firefox < 52.2.0 cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
mozilla firefox < 54.0 cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
mozilla thunderbird < 52.2.0 cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
sil graphite2 < 1.3.10 cpe:2.3:a:sil:graphite2:*:*:*:*:*:*:*:*

References for CVE-2017-7778

URL Tags
http://www.securityfocus.com/bid/99057 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1038689 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2017:1440 Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1561 Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1793 Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1349310 Issue Tracking Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1350047 Issue Tracking Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1352745 Issue Tracking Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1352747 Issue Tracking Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1355174 Issue Tracking Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1355182 Issue Tracking Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1356607 Issue Tracking Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1358551 Issue Tracking Vendor Advisory
https://security.gentoo.org/glsa/201710-13 Third Party Advisory
https://www.debian.org/security/2017/dsa-3881 Third Party Advisory
https://www.debian.org/security/2017/dsa-3894 Third Party Advisory
https://www.debian.org/security/2017/dsa-3918 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2017-15/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-16/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-17/ Vendor Advisory
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