Vulnerability CVE-2019-17026
Published: 2020-03-02

Description:
Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 68.4.1, Thunderbird < 68.4.1, and Firefox < 72.0.1.

See advisories in our WLB2 database:
Topic
Author
Date
High
Mozilla Firefox 67 Array.pop JIT Type Confusion
deadlock
03.02.2022

Type:

CWE-843

 (Access of Resource Using Incompatible Type ('Type Confusion'))

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.8/10
6.4/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Mozilla -> Firefox 
Mozilla -> Firefox esr 
Mozilla -> Thunderbird 

 References:
https://bugzilla.mozilla.org/show_bug.cgi?id=1607443
https://www.mozilla.org/security/advisories/mfsa2020-03/
https://www.mozilla.org/security/advisories/mfsa2020-04/
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