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TI-2017-05422 Aliases CVE-2017-7805GHSA-595h-pjc7-9xf6

Use after free in Mozilla Firefox

Priority LOW 38CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 16 fixed, 1 without a fix

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

Summary

During TLS 1.2 exchanges, handshake hashes are generated which point to a message buffer. This saved data is used for later messages but in some cases, the handshake transcript can exceed the space available in the current buffer, causing the allocation of a new buffer. This leaves a pointer pointing to the old, freed buffer, resulting in a use-after-free when handshake hashes are then calculated afterwards. This can result in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.

Why it matters now

EPSS 0.0305 87th percentileScored 2026-11-07
Fix Partial Firefox (Mozilla): 56Firefox ESR (Mozilla): 52.4+1 more productRed Hat: 1 advisoryRed Hat: 16 fixed, 1 without a fix

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefoxbefore 5656Patch availableCNA
MozillaFirefox ESRbefore 52.452.4Patch availableCNA
MozillaThunderbirdbefore 52.452.4Patch availableCNA
  • Firefox VendorMozilla Affected before 56 Fixed in 56 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 52.4 Fixed in 52.4 Patch available CNA
  • Thunderbird VendorMozilla Affected before 52.4 Fixed in 52.4 Patch available CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:52.4.0:*:*:*:*:*:*:*52.4.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox:56.0:*:*:*:*:*:*:*56.0VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:52.4.0:*:*:*:*:*:*:*52.4.0VulnerableMozilla
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*7.0VulnerableDebian
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:a:mozilla:firefox:52.4.0:*:*:*:*:*:*:* Versions 52.4.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:56.0:*:*:*:*:*:*:* Versions 56.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:52.4.0:*:*:*:*:*:*:* Versions 52.4.0 Vulnerable ·Mozilla
  • cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian
  • 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

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 56
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 52.4
  • Fix · CNA Thunderbird (Mozilla) Fixed in 52.4

Red Hat 1 advisory

  • RHSA-2017:2832 Released 2017-09-28 · Red Hat rating Important
    nss security update
    • Red Hat Enterprise Linux Client (v. 7) nss-3.28.4-12.el7_4, nss-sysinit-3.28.4-12.el7_4, nss-tools-3.28.4-12.el7_4
    • Red Hat Enterprise Linux Client Optional (v. 7) nss-devel-3.28.4-12.el7_4, nss-pkcs11-devel-3.28.4-12.el7_4
    • Red Hat Enterprise Linux ComputeNode (v. 7) nss-3.28.4-12.el7_4, nss-sysinit-3.28.4-12.el7_4, nss-tools-3.28.4-12.el7_4
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) nss-devel-3.28.4-12.el7_4, nss-pkcs11-devel-3.28.4-12.el7_4
    • Red Hat Enterprise Linux Desktop (v. 6) nss-3.28.4-4.el6_9, nss-sysinit-3.28.4-4.el6_9, nss-tools-3.28.4-4.el6_9
    • Red Hat Enterprise Linux Desktop Optional (v. 6) nss-devel-3.28.4-4.el6_9, nss-pkcs11-devel-3.28.4-4.el6_9
    • Red Hat Enterprise Linux HPC Node (v. 6) nss-3.28.4-4.el6_9, nss-sysinit-3.28.4-4.el6_9, nss-tools-3.28.4-4.el6_9
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) nss-devel-3.28.4-4.el6_9, nss-pkcs11-devel-3.28.4-4.el6_9
    • Red Hat Enterprise Linux Server (v. 6) nss-3.28.4-4.el6_9, nss-3.28.4-4.el6_9.ppc, nss-devel-3.28.4-4.el6_9 +3
    • Red Hat Enterprise Linux Server (v. 7) nss-3.28.4-12.el7_4, nss-3.28.4-12.el7_4.ppc, nss-devel-3.28.4-12.el7_4 +3
    • Red Hat Enterprise Linux Server Optional (v. 6) nss-pkcs11-devel-3.28.4-4.el6_9, nss-pkcs11-devel-3.28.4-4.el6_9.ppc
    • Red Hat Enterprise Linux Server Optional (v. 7) nss-pkcs11-devel-3.28.4-12.el7_4, nss-pkcs11-devel-3.28.4-12.el7_4.ppc
    • Red Hat Enterprise Linux Workstation (v. 6) nss-3.28.4-4.el6_9, nss-devel-3.28.4-4.el6_9, nss-sysinit-3.28.4-4.el6_9 +1
    • Red Hat Enterprise Linux Workstation (v. 7) nss-3.28.4-12.el7_4, nss-devel-3.28.4-12.el7_4, nss-sysinit-3.28.4-12.el7_4 +1
    • Red Hat Enterprise Linux Workstation Optional (v. 6) nss-pkcs11-devel-3.28.4-4.el6_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) nss-pkcs11-devel-3.28.4-12.el7_4

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 — GLSA-201803-14

    21 records Highest priority Priority MEDIUM 13 MEDIUM, 8 LOW

    Other records, highest priority first

    • TI-2017-05404 Memory corruption in Mozilla ThunderbirdPriority MEDIUM 49
    • TI-2017-05403 Memory corruption in Mozilla ThunderbirdPriority MEDIUM 49
    • TI-2017-05441 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
    Show all 21 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR, Thunderbird — DSA-3987

    8 records Highest priority Priority MEDIUM 5 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2017-05441 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
    • TI-2017-05436 Use after free in Mozilla FirefoxPriority MEDIUM 48
    • TI-2017-05435 Use after free in Mozilla FirefoxPriority MEDIUM 48
    Show all 8 records → Advisory →
Show 1 more group
  • Advisory ·

    Mozilla Firefox, Firefox ESR, Thunderbird — DSA-4014

    8 records Highest priority Priority MEDIUM 5 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2017-05441 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
    • TI-2017-05436 Use after free in Mozilla FirefoxPriority MEDIUM 48
    • TI-2017-05435 Use after free in Mozilla FirefoxPriority MEDIUM 48
    Show all 8 records → Advisory →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2017:2832
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2017:2832
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2017:2832
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2017:2832
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2017:2832
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2017:2832
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2017:2832
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2017:2832
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2017:2832
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2017:2832
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2017:2832
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2017:2832
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2017:2832
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2017:2832
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2017:2832
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2017:2832

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-7805
  2. 2026-10-03 Alias added: GHSA-595h-pjc7-9xf6

References

Advisory 10

Other 1

  • 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