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CVE-2018-18498

32
FAUCET Score

CVE-2018-18498 is a critical integer overflow vulnerability affecting Mozilla Firefox, Firefox ESR, and Thunderbird versions prior to 64 and 60.4 respectively. This flaw can lead to an out-of-bounds write during image buffer size calculations, potentially allowing for remote code execution. With a CVSS score of 9.8 (CRITICAL), it presents a high risk due to its network-based attack vector, low attack complexity, and severe impact on confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion with 10 mentions, indicating awareness and potential interest.

Impacted Technologies

VendorProductVersion(s)CPE
< 64.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 60.4CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
< 60.4CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

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
4.03%
Probability of exploitation in next 30 days
EPSS Percentile
89.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0403 is in the 83rd 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-2018-18498Important

Mozilla: Integer overflow when calculating buffer sizes for images

Dec 11, 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 / show_bug.cgi
Issue TrackingPermissions RequiredVendor Advisory
lists.debian.org / debian-lts-announce/2018/12/msg00002.html
Mailing ListThird 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