mozilla firefox CVE-2019-11707 vulnerability in Mozilla Products
Published on July 23, 2019

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A type confusion vulnerability can occur when manipulating JavaScript objects due to issues in Array.pop. This can allow for an exploitable crash. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 60.7.1, Firefox < 67.0.3, and Thunderbird < 60.7.2.

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Known Exploited Vulnerability

This Mozilla Firefox and Thunderbird Type Confusion Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Mozilla Firefox and Thunderbird contain a type confusion vulnerability that can occur when manipulating JavaScript objects due to issues in Array.pop, allowing for an exploitable crash.

The following remediation steps are recommended / required by June 13, 2022: Apply updates per vendor instructions.

Vulnerability Analysis

CVE-2019-11707 can be exploited with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. It has an exploitability score of 2.8 out of four. The potential impact of an exploit of this vulnerability is considered to be very high.

What is an Object Type Confusion Vulnerability?

The program 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.

CVE-2019-11707 has been classified to as an Object Type Confusion vulnerability or weakness.


Products Associated with CVE-2019-11707

You can be notified by stack.watch whenever vulnerabilities like CVE-2019-11707 are published in these products:

Mozilla Firefox
 
Mozilla FireFox Extended Support Release (ESR)
 
Mozilla Thunderbird
 

What versions are vulnerable to CVE-2019-11707?