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CVE-2014-1512· NVD / CVE Program· CNA mozilla

Use-after-free vulnerability in the TypeObject class in the JavaScript engine in Mozilla Firefox before 28.0, Firefox ESR 24.x before 24.4,

Noroxi assessment

Priority: Plan (action score 49/100)

  • 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: 29.2% (FIRST EPSS); higher than 98.1% of all records.
  • No special conditions are required; it is repeatable.
  • Fixed version: icedove (Debian:7) 24.4.0-1~deb7u1; iceweasel (Debian:7) 24.4.0esr-1~deb7u2; firefox (Red Hat:enterprise_linux:5::client) 0:24.4.0-1.el5_10.

Add it to your regular patch cycle. Upgrade to icedove (Debian:7) 24.4.0-1~deb7u1; iceweasel (Debian:7) 24.4.0esr-1~deb7u2; firefox (Red Hat:enterprise_linux:5::client) 0:24.4.0-1.el5_10 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

Use-after-free vulnerability in the TypeObject class in the JavaScript engine in Mozilla Firefox before 28.0, Firefox ESR 24.x before 24.4, Thunderbird before 24.4, and SeaMonkey before 2.25 allows remote attackers to execute arbitrary code by triggering extensive memory consumption while garbage collection is occurring, as demonstrated by improper handling of BumpChunk objects.

CriticalCVSS 10.0 · v2.0—No exploit Fix available
Published
Mar 19, 2014
Updated
Jun 16, 2026
EPSS
29.2% · 98th percentile

Report tools

JSON

Action score

49

Plan

Add it to your regular patch cycle.

CVSS
40 / 40 · 10.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
9 / 30 · 29.2%

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-2014-1512

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

and 4 more

Affected versions

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

  • canonical ubuntu linux12.04
  • canonical ubuntu linux12.10
  • canonical ubuntu linux13.10
  • debian debian linux7.0
  • debian debian linux8.0
  • mozilla firefoxbefore 28.0
  • mozilla firefox24.0 and later · before 24.4
  • mozilla seamonkeybefore 2.25
  • mozilla thunderbirdbefore 24.4
  • opensuse opensuse11.4
  • opensuse opensuse12.3
  • opensuse opensuse13.1
  • redhat enterprise linux desktop5.0
  • redhat enterprise linux desktop6.0
  • redhat enterprise linux eus6.5
  • redhat enterprise linux server5.0
  • redhat enterprise linux server6.0
  • redhat enterprise linux server aus6.5
  • redhat enterprise linux server eus6.5
  • redhat enterprise linux server tus6.5

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:7icedovebefore 24.4.0-1~deb7u124.4.0-1~deb7u1
Debian:7iceweaselbefore 24.4.0esr-1~deb7u224.4.0esr-1~deb7u2
Red Hat:enterprise_linux:5::clientfirefoxbefore 0:24.4.0-1.el5_100:24.4.0-1.el5_10
Red Hat:enterprise_linux:5::clientfirefox-debuginfobefore 0:24.4.0-1.el5_100:24.4.0-1.el5_10
Red Hat:enterprise_linux:5::clientthunderbirdbefore 0:24.4.0-1.el5_100:24.4.0-1.el5_10
Red Hat:enterprise_linux:5::clientthunderbird-debuginfobefore 0:24.4.0-1.el5_100:24.4.0-1.el5_10
Red Hat:enterprise_linux:6::clientfirefoxbefore 0:24.4.0-1.el6_50:24.4.0-1.el6_5
Red Hat:enterprise_linux:6::clientfirefox-debuginfobefore 0:24.4.0-1.el6_50:24.4.0-1.el6_5
Red Hat:enterprise_linux:6::clientthunderbirdbefore 0:24.4.0-1.el6_50:24.4.0-1.el6_5
Red Hat:enterprise_linux:6::clientthunderbird-debuginfobefore 0:24.4.0-1.el6_50:24.4.0-1.el6_5

Same product

mozilla: all records

Other highest-scoring records for the same primary product.

  • CVE-2010-3765Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before 3.1.6 and 3.0.x before 3.0.10, and SeaMonkey 2.x befKEV
    94Now
  • CVE-2019-11708Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxeKEV
    87Now
  • CVE-2015-4495The PDF reader in Mozilla Firefox before 39.0.3, Firefox ESR 38.x before 38.1.1, and Firefox OS before 2.2 allows remote attackers to bypassKEV
    86Now
  • CVE-2013-1690Mozilla Firefox before 22.0, Firefox ESR 17.x before 17.0.7, Thunderbird before 17.0.7, and Thunderbird ESR 17.x before 17.0.7 do not properKEV
    86Now
  • CVE-2019-17026Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion.KEV
    79This week
  • CVE-2024-9680An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines.KEV
    76This week

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:icedove24.4.0-1~deb7u1 · Debian:7Package registry (OSV)
debian:iceweasel24.4.0esr-1~deb7u2 · Debian:7Package registry (OSV)
red hat:firefox0:24.4.0-1.el5_10 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:firefox-debuginfo0:24.4.0-1.el5_10 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:thunderbird0:24.4.0-1.el5_10 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:thunderbird-debuginfo0:24.4.0-1.el5_10 · Red Hat:enterprise_linux:5::clientPackage 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.

Credits

All researchers

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

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
C · data can be read
Integrity
C · data or configuration can be modified
Availability
C · the service can be disrupted
Attack complexity
Low
Confidentiality impact
C
Integrity impact
C
Availability impact
C

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

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

Vulnerable

c
free(dev->buf);/* ... another thread is still running ... */process(dev->buf);

Fixed

c
lock(&dev->lock);free(dev->buf);dev->buf = NULL;unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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

References

Show all references (13 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records