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CVE-2018-12405

30
FAUCET Score

CVE-2018-12405 describes multiple memory safety bugs in Firefox 63, Firefox ESR 60.3, and earlier versions of Thunderbird, Firefox ESR, and Firefox. These flaws, categorized as CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), could lead to memory corruption and potentially arbitrary code execution. With a CVSS score of 9.8 (CRITICAL), the vulnerability is remotely exploitable with low attack complexity and no user interaction, allowing for high impact on confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 60.4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 64.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 60.4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.20%
Probability of exploitation in next 30 days
EPSS Percentile
86.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0320 is in the 79th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:60.4.0-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:60.4.0-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:60.4.0-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: thunderbird-0:60.4.0-1.el7_6
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2018-12405Critical

Mozilla: Memory safety bugs fixed in Firefox 64 and Firefox ESR 60.4

Dec 12, 2018

References

access.redhat.com / errata/RHSA-2018:3831
Third Party Advisory
access.redhat.com / errata/RHSA-2018:3833
Third Party Advisory
access.redhat.com / errata/RHSA-2019:0159
Third Party Advisory
access.redhat.com / errata/RHSA-2019:0160
Third Party Advisory
bugzilla.mozilla.org / buglist.cgi
Broken LinkIssue TrackingVendor Advisory
lists.debian.org / debian-lts-announce/2018/12/msg00002.html
Third Party Advisory
security.gentoo.org / glsa/201903-04
Third Party Advisory
usn.ubuntu.com / 3844-1
Third Party Advisory
usn.ubuntu.com / 3868-1
Third Party Advisory
debian.org / security/2018/dsa-4354
Third Party Advisory
debian.org / security/2019/dsa-4362
Third Party Advisory
mozilla.org / security/advisories/mfsa2018-29
Vendor Advisory
mozilla.org / security/advisories/mfsa2018-30
Vendor Advisory
mozilla.org / security/advisories/mfsa2018-31
Vendor Advisory
securityfocus.com / bid/106168
Third Party AdvisoryVDB Entry