Security readout for executives and security teams
On Linux, vulnerable Firefox and Thunderbird versions could fail to apply Mozilla's Gecko Media Plugin sandbox when a seccomp-bpf filter was already active. Code expected to run in a stronger sandbox instead ran with only a weaker filter. The sources do not show active exploitation. Exposure is likely limited to Linux systems running Firefox versions earlier than 52 or Thunderbird versions earlier than 52. Other operating systems are explicitly listed as unaffected. Modern supported installations should not be exposed if they are past those versions. Treat this as a legacy Linux exposure cleanup issue. It is not shown as actively exploited, but affected versions are very old and reduce sandbox protection. Any remaining instances should be removed or upgraded promptly. Mitigation focus: Upgrade Firefox to version 52 or later, preferably a currently supported release.; Upgrade Thunderbird to version 52 or later, preferably a currently supported release.; Prioritize Linux endpoints and legacy application inventories..
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2017-5426 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
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/mfsa2017-09/CVE reference · x_refsource_CONFIRM
- https://bugzilla.mozilla.org/show_bug.cgi?id=1257361CVE reference · x_refsource_CONFIRM
- https://www.mozilla.org/security/advisories/mfsa2017-05/CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.