CVE-2019-9793

Summary

A mechanism was discovered that removes some bounds checking for string, array, or typed array accesses if Spectre mitigations have been disabled. This vulnerability could allow an attacker to create an arbitrary value in compiled JavaScript, for which the range analysis will infer a fully controlled, incorrect range in circumstances where users have explicitly disabled Spectre mitigations. Note: Spectre mitigations are currently enabled for all users by default settings.. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

Affected Software

VendorProductVersion RangeStatus
MozillaThunderbirdunspecified < 60.6affected
MozillaFirefox ESRunspecified < 60.6affected
MozillaFirefoxunspecified < 66affected

Weaknesses

  • Improper bounds checks when Spectre mitigations are disabled

ADP Enrichment

CVE Program Container

Additional References

References