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CVE-2019-9793

Public on 2019-04-25
Modified on 2019-04-26
Description

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.

Severity
Important
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CVSS v3 Base Score
5.9
See breakdown
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Core thunderbird 2019-04-25 16:37 ALAS2-2019-1195

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD CVSSv2 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N
NVD CVSSv3 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

References

Red Hat: CVE-2019-9793 Mitre: CVE-2019-9793 FAQs regarding Amazon Linux ALAS/CVE Severity