CVE-2019-9793 - CVE House

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Status published Medium CVE-2019-9793

A mechanism was discovered that removes some bounds checking for...

5.9 CVSS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from Mozilla

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Memory safety bugs fixed in Firefox 142 and Thunderbird 142

Spoofing issue in the Address Bar component of Firefox Focus for Android

Memory safety bugs fixed in Firefox ESR 115.27, Firefox ESR 128.14, Thunderbird ESR 128.14, Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142

Memory safety bugs fixed in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142

Spoofing issue in the Address Bar component

Affected Vendor

Mozilla

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Affected Software

Thunderbird, Firefox ESR, Firefox

Vulnerable Versions:

unspecified

Timeline

Official Publish: April 26th, 2019

Last Modified: August 4th, 2024

Added to House: July 20th, 2026

CVSS Vectors

V3: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.