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CVE-2016-9079

Mozilla — Mozilla Firefox, Firefox ESR, and Thunderbird Use-After-Free Vulnerability

Mozilla · CWE-416 — Use after free · in CISA KEV since 2023-06-22

KEV since 2023 · listed over a yearCISA KEVActively Exploited
81

EVRS 81 of 100 Urgent

Patch This Cycle

Rank 564 of 2,960 tracked

Download PDF

Why it scores 81

Evidence available: 6 of 7 signals

Listed in the CISA KEV catalog, and an EPSS probability of 0.874.

  • CISA KEVApplied
  • RansomwareDid not apply
  • Vendor exploitationDid not apply
  • EPSSApplied
  • Microsoft Exploitability IndexNot applicable
  • Pre-patch disclosureNo data
  • KEV recencyDid not apply
  • CVSSApplied

The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data

Fix

Patch or fixed version identified

CISA required action

Fixed in

firefox-esr -> 45.5.1esr-1 | firefox -> 50.0.2-1

Affected versions

  • thunderbird< 45.5.1
  • firefox< 50.0.2< 45.5.1
  • tor
  • debian linux9.0
  • enterprise linux5.06.07.0
  • enterprise linux desktop5.06.07.0
  • enterprise linux server5.06.07.0
  • enterprise linux server aus7.37.4

+3 more affected products; see the full list at NVD.

Remediation

Apply updates per vendor instructions.

Fixed versions from NVD.

Evidence

Each value with its source
MeasureValueSource
CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. 7.5 NVD
FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. 0.874 (99.76th pctl) FIRST EPSS
Actively exploitedWhether a source of record has confirmed attacks using it in the wild. Confirmed CISA KEV
Ransomware campaign useWhether CISA has seen ransomware operators use it. Unknown or none CISA KEV
CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. 2023-07-13 · KEV since 2023 · listed over a year CISA KEV
Public exploit moduleA module existing is not the same as active exploitation. Public module exists Metasploit
EUVD cross-referenceENISA's record: CVSS 7.5 (v3.1), assigned by mozilla. Listed ENISA EUVD

Description

NVD

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.

What CISA says to do

Public module

Metasploit lists a public normal-rank module for this CVE: Firefox nsSMILTimeContainer::NotifyTimeChange() RCE (windows/browser/firefox_smil_uaf). A module existing is not the same as active exploitation; see metasploit.com.