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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2019-04-26T16:13:22

Updated: 2024-08-04T22:01:54.816Z

Reserved: 2019-03-14T00:00:00

Link: CVE-2019-9793

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-04-26T17:29:01.850

Modified: 2019-05-13T10:29:05.740

Link: CVE-2019-9793

cve-icon Redhat

Severity : Important

Publid Date: 2019-03-20T00:00:00Z

Links: CVE-2019-9793 - Bugzilla