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NVD / CVE Program· CNA mozilla

CVE-2018-12365: A compromised IPC child process can escape the content sandbox and list the names of arbitrary files on the file system without user consent

Noroxi assessment

Priority: Monitor (action score 27/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 3.1% (FIRST EPSS); higher than 87.8% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: firefox-esr (Debian:12) 52.9.0esr-1; thunderbird (Debian:12) 1:52.9.0-1; firefox-esr (Debian:8) 52.9.0esr-1~deb8u1.

Low priority for now. Upgrade to firefox-esr (Debian:12) 52.9.0esr-1; thunderbird (Debian:12) 1:52.9.0-1; firefox-esr (Debian:8) 52.9.0esr-1~deb8u1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A compromised IPC child process can escape the content sandbox and list the names of arbitrary files on the file system without user consent or interaction. This could result in exposure of private local files. This vulnerability affects Thunderbird < 60, Thunderbird < 52.9, Firefox ESR < 60.1, Firefox ESR < 52.9, and Firefox < 61.

MediumCVSS 6.5 · v3.0—No exploit Fix available
Published
Oct 18, 2018
Updated
Jun 16, 2026
EPSS
3.1% · 87th percentile

Report tools

JSON

Action score

27

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 3.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2018-12365

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
redhatenterprise linux desktop
redhatenterprise linux server
redhatenterprise linux server aus
redhatenterprise linux server eus
redhatenterprise linux server tus
redhatenterprise linux workstation
debiandebian linux
canonicalubuntu linux
mozillafirefox
mozillafirefox esr
mozillathunderbird

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • canonical ubuntu linux14.04
  • canonical ubuntu linux16.04
  • canonical ubuntu linux17.10
  • canonical ubuntu linux18.04
  • debian debian linux8.0
  • debian debian linux9.0
  • mozilla firefoxbefore 61.0
  • mozilla firefox53.0 and later · before 60.1.0
  • mozilla firefox esrbefore 52.9
  • mozilla thunderbird52.9.1 and later · before 60.0
  • mozilla thunderbirdbefore 52.9
  • redhat enterprise linux desktop6.0
  • redhat enterprise linux desktop7.0
  • redhat enterprise linux server6.0
  • redhat enterprise linux server7.0
  • redhat enterprise linux server aus7.6
  • redhat enterprise linux server eus7.5
  • redhat enterprise linux server eus7.6
  • redhat enterprise linux server tus7.6
  • redhat enterprise linux workstation6.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (mozilla). Independent of NVD's CPE analysis and usually ahead of it.

  • Mozilla Firefox

    • unspecified and later · before 61affected
  • Mozilla Firefox ESR

    • unspecified and later · before 60.1affected
    • unspecified and later · before 52.9affected
  • Mozilla Thunderbird

    • unspecified and later · before 60affected
    • unspecified and later · before 52.9affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12firefox-esrbefore 52.9.0esr-152.9.0esr-1
Debian:12thunderbirdbefore 1:52.9.0-11:52.9.0-1
Debian:8firefox-esrbefore 52.9.0esr-1~deb8u152.9.0esr-1~deb8u1
Debian:8thunderbirdbefore 1:52.9.1-1~deb8u11:52.9.1-1~deb8u1
Debian:9firefox-esrbefore 52.9.0esr-1~deb9u152.9.0esr-1~deb9u1
Debian:9thunderbirdbefore 1:52.9.1-1~deb9u11:52.9.1-1~deb9u1
Red Hat:enterprise_linux:6::clientfirefoxbefore 0:60.1.0-5.el60:60.1.0-5.el6
Red Hat:enterprise_linux:6::clientfirefox-debuginfobefore 0:60.1.0-5.el60:60.1.0-5.el6
Red Hat:enterprise_linux:6::clientthunderbirdbefore 0:52.9.1-1.el60:52.9.1-1.el6
Red Hat:enterprise_linux:6::clientthunderbird-debuginfobefore 0:52.9.1-1.el60:52.9.1-1.el6
Red Hat:enterprise_linux:7::clientfirefoxbefore 0:60.1.0-4.el7_50:60.1.0-4.el7_5
Red Hat:enterprise_linux:7::clientfirefox-debuginfobefore 0:60.1.0-4.el7_50:60.1.0-4.el7_5
Red Hat:enterprise_linux:7::clientthunderbirdbefore 0:52.9.1-1.el7_50:52.9.1-1.el7_5
Red Hat:enterprise_linux:7::clientthunderbird-debuginfobefore 0:52.9.1-1.el7_50:52.9.1-1.el7_5
SUSE:Linux Enterprise Module for Desktop Applications 15MozillaFirefoxbefore 52.9.0esr-3.7.1252.9.0esr-3.7.12
SUSE:Linux Enterprise Software Development Kit 11 SP4MozillaFirefoxbefore 52.9.0esr-72.38.652.9.0esr-72.38.6
SUSE:Linux Enterprise Workstation Extension 15MozillaThunderbirdbefore 52.9.1-3.7.152.9.1-3.7.1
SUSE:Linux Enterprise Workstation Extension 15MozillaThunderbirdbefore 60.2.1-3.13.160.2.1-3.13.1
SUSE:OpenStack Cloud 7MozillaFirefoxbefore 52.9.0esr-109.38.252.9.0esr-109.38.2
SUSE:Package Hub 12MozillaThunderbirdbefore 60.3.0-74.260.3.0-74.2
SUSE:Package Hub 15seamonkeybefore 2.49.4-bp150.3.3.12.49.4-bp150.3.3.1

Other highest-scoring records for the same primary product.

  • CVE-2017-5375JIT code allocation can allow for a bypass of ASLR and DEP protections leading to potential memory corruption attacks.
    49Plan
  • CVE-2018-14649It was found that ceph-isci-cli package as shipped by Red Hat Ceph Storage 2 and 3 is using python-werkzeug in debug shell mode.
    43Plan
  • CVE-2016-7050SerializableProvider in RESTEasy in Red Hat Enterprise Linux Desktop 7, Red Hat Enterprise Linux HPC Node 7, Red Hat Enterprise Linux Server
    41Plan

Published before and after this one in the same product

  • ← EarlierCVE-2018-12363Oct 18, 2018 · A use-after-free vulnerability can occur when script uses mutation events to move DOM nodes between documents, resulting in the old document
    36Monitor
  • ← EarlierCVE-2018-12364Oct 18, 2018 · NPAPI plugins, such as Adobe Flash, can send non-simple cross-origin requests, bypassing CORS by making a same-origin POST that does a 307 r
    36Monitor
  • Later →CVE-2018-12366Oct 18, 2018 · An invalid grid size during QCMS (color profile) transformations can result in the out-of-bounds read interpreted as a float value.
    27Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:firefox-esr52.9.0esr-1 · Debian:12Package registry (OSV)
debian:thunderbird1:52.9.0-1 · Debian:12Package registry (OSV)
red hat:firefox0:60.1.0-5.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:firefox-debuginfo0:60.1.0-5.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:thunderbird0:52.9.1-1.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:thunderbird-debuginfo0:52.9.1-1.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
suse:MozillaFirefox52.9.0esr-3.7.12 · SUSE:Linux Enterprise Module for Desktop Applications 15Package registry (OSV)
suse:MozillaThunderbird52.9.1-3.7.1 · SUSE:Linux Enterprise Workstation Extension 15Package registry (OSV)
suse:seamonkey2.49.4-bp150.3.3.1 · SUSE:Package Hub 15Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

CVSS vector

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

nvd-primary

Root cause

The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

json
{  "permissions": ["tabs", "<all_urls>"],  "background": { "service_worker": "analytics.js" }}

Fixed

json
{  "permissions": ["activeTab"],  "host_permissions": ["https://yildiz.example/*"]}

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

All records