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TI-2017-05371 Aliases CVE-2017-7751GHSA-c2f5-xvj6-qcxv

Use after free in Mozilla Firefox

Priority MEDIUM 47CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

A use-after-free vulnerability with content viewer listeners that results in a potentially exploitable crash. This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.

Why it matters now

EPSS 0.02776 86th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Firefox (Mozilla): 54Firefox ESR (Mozilla): 52.2+1 more productRed Hat: 2 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefoxbefore 5454Patch availableCNA
MozillaFirefox ESRbefore 52.252.2Patch availableCNA
MozillaThunderbirdbefore 52.252.2Patch availableCNA
  • Firefox VendorMozilla Affected before 54 Fixed in 54 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 52.2 Fixed in 52.2 Patch available CNA
  • Thunderbird VendorMozilla Affected before 52.2 Fixed in 52.2 Patch available CNA

CPE configurations NVD · 17

CPEVersionsRoleVendor
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:*7.3VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
Show 7 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:*7.3VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*7.5VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 54.0; before 52.2.0VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 52.2.0VulnerableMozilla
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 54.0; before 52.2.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 52.2.0 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 54
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 52.2
  • Fix · CNA Thunderbird (Mozilla) Fixed in 52.2

Red Hat 2 advisories

  • RHSA-2017:1561 Released 2017-06-21 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-52.2.0-1.el7_3
    • Red Hat Enterprise Linux Desktop (v. 6) thunderbird-52.2.0-1.el6_9
    • Red Hat Enterprise Linux Server Optional (v. 6) thunderbird-52.2.0-1.el6_9
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-52.2.0-1.el7_3
    • Red Hat Enterprise Linux Workstation (v. 6) thunderbird-52.2.0-1.el6_9
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-52.2.0-1.el7_3
  • RHSA-2017:1440 Released 2017-06-14 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux Client (v. 7) firefox-52.2.0-1.el7_3
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-52.2.0-1.el7_3
    • Red Hat Enterprise Linux Desktop (v. 6) firefox-52.2.0-1.el6_9
    • Red Hat Enterprise Linux Desktop Optional (v. 6) firefox-52.2.0-1.el6_9
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox-52.2.0-1.el6_9
    • Red Hat Enterprise Linux Server (v. 6) firefox-52.2.0-1.el6_9
    • Red Hat Enterprise Linux Server (v. 7) firefox-52.2.0-1.el7_3
    • Red Hat Enterprise Linux Server Optional (v. 6) firefox-52.2.0-1.el6_9, firefox-52.2.0-1.el6_9.ppc
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-52.2.0-1.el7_3, firefox-52.2.0-1.el7_3.ppc
    • Red Hat Enterprise Linux Workstation (v. 6) firefox-52.2.0-1.el6_9
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-52.2.0-1.el7_3
    • Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-52.2.0-1.el6_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-52.2.0-1.el7_3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Mozilla Firefox, Firefox ESR, Thunderbird — RHSA-2017:1440

    12 records Highest priority Priority MEDIUM 10 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2017-05396 Memory corruption in Mozilla FirefoxPriority MEDIUM 50
    • TI-2017-05377 Use after free in Mozilla FirefoxPriority MEDIUM 47
    • TI-2017-05376 Use after free in Mozilla FirefoxPriority MEDIUM 47
    Show all 12 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR, Thunderbird — RHSA-2017:1561

    12 records Highest priority Priority MEDIUM 10 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2017-05396 Memory corruption in Mozilla FirefoxPriority MEDIUM 50
    • TI-2017-05377 Use after free in Mozilla FirefoxPriority MEDIUM 47
    • TI-2017-05376 Use after free in Mozilla FirefoxPriority MEDIUM 47
    Show all 12 records → Advisory →
Show 2 more groups
  • Advisory ·

    Mozilla Firefox, Firefox ESR, Thunderbird — DSA-3881

    12 records Highest priority Priority MEDIUM 10 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2017-05396 Memory corruption in Mozilla FirefoxPriority MEDIUM 50
    • TI-2017-05377 Use after free in Mozilla FirefoxPriority MEDIUM 47
    • TI-2017-05376 Use after free in Mozilla FirefoxPriority MEDIUM 47
    Show all 12 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR, Thunderbird — DSA-3918

    12 records Highest priority Priority MEDIUM 10 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2017-05396 Memory corruption in Mozilla FirefoxPriority MEDIUM 50
    • TI-2017-05377 Use after free in Mozilla FirefoxPriority MEDIUM 47
    • TI-2017-05376 Use after free in Mozilla FirefoxPriority MEDIUM 47
    Show all 12 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2017:1440, RHSA-2017:1561
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2017:1440
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2017:1440, RHSA-2017:1561
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2017:1440
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2017:1440
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2017:1440
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2017:1440
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2017:1440, RHSA-2017:1561
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2017:1440, RHSA-2017:1561
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2017:1440, RHSA-2017:1561
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2017:1440, RHSA-2017:1561
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2017:1440
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2017:1440

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-7751
  2. 2026-10-03 Alias added: GHSA-c2f5-xvj6-qcxv

References

Exploit 1

Advisory 7

  • TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
  • TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
  • TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 3444 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences