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CVE-2019-9791

nvd nist
Published: Apr 26, 2019Modified: Nov 25, 2025

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9.8
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability: 3.9 / Impact: 5.9
Source: NVD

Description

The type inference system allows the compilation of functions that can cause type confusions between arbitrary objects when compiled through the IonMonkey just-in-time (JIT) compiler and when the constructor function is entered through on-stack replacement (OSR). This allows for possible arbitrary reading and writing of objects during an exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

Affected (11)

Mozilla
2 products
Firefox
Thunderbird
Redhat
4 products
Enterprise Linux
Enterprise Linux Eus
Enterprise Linux Server Aus
Enterprise Linux Server Tus
Configuration A
3 vulnerable
Vulnerable SoftwareAffected Versions
Mozilla
Firefox
Before 60.6.0
Firefox
Before 66.0
Thunderbird
Before 60.6.0
Configuration B
8 vulnerable
Vulnerable SoftwareAffected Versions
Enterprise Linux
Version 8.0
Redhat
Enterprise Linux Eus
Version 8.1
Enterprise Linux Eus
Version 8.2
Enterprise Linux Eus
Version 8.4
Redhat
Enterprise Linux Server Aus
Version 8.2
Enterprise Linux Server Aus
Version 8.4
Redhat
Enterprise Linux Server Tus
Version 8.2
Enterprise Linux Server Tus
Version 8.4

Related CWEs

CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.

References (12)

Source: security@mozilla.org
Third Party Advisory
Source: security@mozilla.org
Third Party Advisory
Source: security@mozilla.org
ExploitIssue TrackingVendor Advisory
Source: security@mozilla.org
Vendor Advisory
Source: security@mozilla.org
Vendor Advisory
Source: security@mozilla.org
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
ExploitIssue TrackingVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory

Timeline

No history available yet.