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CVE-2019-9793

N/A
Published: April 26, 2019 at 04:13 PM UTC
Updated: June 17, 2026 at 02:44 AM UTC
3 products affected across 1 vendorFirefoxThunderbirdFirefox ESR

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Severity
N/A
Exploit prediction
EPSS 2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Firefox· Mozilla
95%
v < 66
Affected range stops below 66, so it looks safe — our inference, not a vendor statement
Affected range stops below 66.0, so it looks safe — our inference, not a vendor statement
Firefox ESR· Mozilla
95%
v < 60.6
Affected range stops below 60.6, so it looks safe — our inference, not a vendor statement
Thunderbird· Mozilla
95%
v < 60.6
Affected range stops below 60.6, so it looks safe — our inference, not a vendor statement

References (6)

Vendor Advisoryx_refsource_REDHAT
Source: [email protected]
https://access.redhat.com/errata/RHSA-2019:0966
Vendor Advisoryx_refsource_REDHAT
Source: [email protected]
https://access.redhat.com/errata/RHSA-2019:1144
x_refsource_MISCIssue TrackingPermissions RequiredVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1528829
x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2019-07/
x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2019-08/
x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2019-11/

CVSS

4.3MEDIUM[email protected]
Confidentiality
NONE
Integrity
PARTIAL
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-119

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