Security readout for executives and security teams
CVE-2017-5396 is a Mozilla media-handling memory safety flaw. Certain media events could occur after a media element was freed, creating a use-after-free condition. The listed affected products are Firefox before 51, Firefox ESR before 45.7, and Thunderbird before 45.7. Exposure is most likely on endpoints or servers running legacy Mozilla Firefox, Firefox ESR, or Thunderbird versions below the fixed releases. Modern installations should be unaffected if updated beyond Firefox 51, Firefox ESR 45.7, and Thunderbird 45.7. Prioritize remediation where legacy Mozilla browsers or Thunderbird remain in use, especially on systems handling untrusted web or email content. This is old, not KEV-listed, but memory safety flaws in client software can still create meaningful endpoint risk if obsolete versions persist. Mitigation focus: Upgrade Firefox to version 51 or later.; Upgrade Firefox ESR to version 45.7 or later.; Upgrade Thunderbird to version 45.7 or later..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2017-5396 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.mozilla.org/security/advisories/mfsa2017-03/CVE reference · x_refsource_CONFIRM
- https://www.mozilla.org/security/advisories/mfsa2017-02/CVE reference · x_refsource_CONFIRM
- GLSA-201702-22CVE reference · vendor-advisory, x_refsource_GENTOO
- DSA-3832CVE reference · vendor-advisory, x_refsource_DEBIAN
- GLSA-201702-13CVE reference · vendor-advisory, x_refsource_GENTOO
- DSA-3771CVE reference · vendor-advisory, x_refsource_DEBIAN
- https://www.mozilla.org/security/advisories/mfsa2017-01/CVE reference · x_refsource_CONFIRM
- https://bugzilla.mozilla.org/show_bug.cgi?id=1329403CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
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