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CVE-2016-9079· NVD / CVE Program· CNA mozilla

A use-after-free vulnerability in SVG Animation has been discovered.

A use-after-free vulnerability in SVG Animation has been discovered. An exploit built on this vulnerability has been discovered in the wild targeting Firefox and Tor Browser users on Windows. This vulnerability affects Firefox < 50.0.2, Firefox ESR < 45.5.1, and Thunderbird < 45.5.1.

HighCVSS 7.5 · v3.1KEVWeaponized Fix available
Published
Jun 11, 2018
Updated
Jun 16, 2026
EPSS
87.4% · 100th percentile
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Action score

86

Now

Patch today or shut off access.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
30 / 30 · Listed
EPSS
26 / 30 · 87.4%

CISA SSVC decision

Exploitation
active
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Jun 22, 2023. That signals real attacks, not theory.

Remediation deadline for government agencies: Jul 13, 2023.

Affected systems

VendorProduct
debiandebian linux
redhatenterprise linux server eus
redhatenterprise linux
redhatenterprise linux desktop
redhatenterprise linux server
redhatenterprise linux server aus
redhatenterprise linux workstation
mozillathunderbird
microsoftwindows
mozillafirefox
torprojecttor

Affected versions

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

  • debian debian linux9.0
  • mozilla firefoxbefore 50.0.2
  • mozilla firefoxbefore 45.5.1
  • mozilla thunderbirdbefore 45.5.1
  • redhat enterprise linux5.0
  • redhat enterprise linux6.0
  • redhat enterprise linux7.0
  • redhat enterprise linux desktop5.0
  • redhat enterprise linux desktop6.0
  • redhat enterprise linux desktop7.0
  • redhat enterprise linux server5.0
  • redhat enterprise linux server6.0
  • redhat enterprise linux server7.0
  • redhat enterprise linux server aus7.3
  • redhat enterprise linux server aus7.4
  • redhat enterprise linux server eus7.3
  • redhat enterprise linux server eus7.4
  • redhat enterprise linux server eus7.5
  • redhat enterprise linux workstation5.0
  • 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 50.0.2affected

  • Mozilla Firefox ESR

    • unspecified and later · before 45.5.1affected

  • Mozilla Thunderbird

    • unspecified and later · before 45.5.1affected

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12firefox-esrbefore 45.5.1esr-145.5.1esr-1
Debian:7firefox-esrbefore 45.5.1esr-1~deb7u145.5.1esr-1~deb7u1
Debian:7icedovebefore 1:45.5.1-1~deb7u11:45.5.1-1~deb7u1
Debian:8firefox-esrbefore 45.5.1esr-1~deb8u145.5.1esr-1~deb8u1
Debian:8icedovebefore 1:45.5.1-1~deb8u11:45.5.1-1~deb8u1
Red Hat:enterprise_linux:5::clientfirefoxbefore 0:45.5.1-1.el5_110:45.5.1-1.el5_11
Red Hat:enterprise_linux:5::clientfirefox-debuginfobefore 0:45.5.1-1.el5_110:45.5.1-1.el5_11
Red Hat:enterprise_linux:5::clientthunderbirdbefore 0:45.5.1-1.el5_110:45.5.1-1.el5_11
Red Hat:enterprise_linux:5::clientthunderbird-debuginfobefore 0:45.5.1-1.el5_110:45.5.1-1.el5_11
Red Hat:enterprise_linux:6::clientfirefoxbefore 0:45.5.1-1.el6_80:45.5.1-1.el6_8
Red Hat:enterprise_linux:6::clientfirefox-debuginfobefore 0:45.5.1-1.el6_80:45.5.1-1.el6_8
Red Hat:enterprise_linux:6::clientthunderbirdbefore 0:45.5.1-1.el6_80:45.5.1-1.el6_8
Red Hat:enterprise_linux:6::clientthunderbird-debuginfobefore 0:45.5.1-1.el6_80:45.5.1-1.el6_8
Red Hat:enterprise_linux:7::clientfirefoxbefore 0:45.5.1-1.el7_30:45.5.1-1.el7_3
Red Hat:enterprise_linux:7::clientfirefox-debuginfobefore 0:45.5.1-1.el7_30:45.5.1-1.el7_3
Red Hat:enterprise_linux:7::clientthunderbirdbefore 0:45.5.1-1.el7_30:45.5.1-1.el7_3
Red Hat:enterprise_linux:7::clientthunderbird-debuginfobefore 0:45.5.1-1.el7_30:45.5.1-1.el7_3
SUSE:Linux Enterprise Desktop 12 SP1MozillaFirefoxbefore 45.5.1esr-93.145.5.1esr-93.1
SUSE:Linux Enterprise Server 11 SP2-LTSSmozilla-nssbefore 3.21.3-30.13.21.3-30.1
SUSE:Linux Enterprise Server 11 SP2-LTSSMozillaFirefoxbefore 45.5.1esr-63.145.5.1esr-63.1
SUSE:Linux Enterprise Software Development Kit 11 SP4mozilla-nssbefore 3.21.3-39.13.21.3-39.1
SUSE:Linux Enterprise Software Development Kit 11 SP4MozillaFirefoxbefore 45.5.1esr-59.145.5.1esr-59.1
SUSE:Package Hub 12MozillaThunderbirdbefore 45.5.1-17.145.5.1-17.1

Same product

debian: all records

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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-esr45.5.1esr-1 · Debian:12Package registry (OSV)
Debian:icedove1:45.5.1-1~deb7u1 · Debian:7Package registry (OSV)
Red Hat:firefox0:45.5.1-1.el5_11 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
Red Hat:firefox-debuginfo0:45.5.1-1.el5_11 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
Red Hat:thunderbird0:45.5.1-1.el5_11 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
Red Hat:thunderbird-debuginfo0:45.5.1-1.el5_11 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
SUSE:mozilla-nss3.21.3-39.1 · SUSE:Linux Enterprise Software Development Kit 11 SP4Package registry (OSV)
SUSE:MozillaFirefox45.5.1esr-93.1 · SUSE:Linux Enterprise Desktop 12 SP1Package registry (OSV)
SUSE:MozillaThunderbird45.5.1-17.1 · SUSE:Package Hub 12Package registry (OSV)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1
  • Exploit-DB entry ×2
  • Proof-of-concept repository on GitHub ×4

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entryremote2017-07-14
Exploit-DB entryremote2017-01-24
Metasploit moduleexploit/windows/browser/firefox_smil_uafFirefox nsSMILTimeContainer::NotifyTimeChange() RCEexploit2016-11-30
Proof-of-concept repository on GitHubstars:12017-02-08
Proof-of-concept repository on GitHubstars:72018-07-29
Proof-of-concept repository on GitHubstars:12020-08-06
Proof-of-concept repository on GitHubstars:12021-10-08

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.

  1. Metasploit-559 d
  2. First PoC-504 d
  3. Published
  4. CISA KEV+1836 d
  5. TodaySep 29, 2026+3032 d
EPSS, last 120 days-1% in 7 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

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • 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
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

  1. Fix✗ → ✓

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

References

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

All records