CVE-2019-17026
HighActively exploited (CISA KEV)
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.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Mozilla Firefox and Thunderbird
PublishedMar 2, 2020
First seenMar 2, 2020
Added to KEVNov 3, 2021
Weakness typeCWE-843CWE-843
How to fix
CISA required action
Apply updates per vendor instructions.
CISA due date: May 3, 2022Update
- mozilla firefox68.4.1, 72.0.1 or later
- mozilla thunderbird68.4.1 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 68.4.1, v < 72.0.1 | 68.4.1, 72.0.1 |
| mozilla thunderbird | v < 68.4.1 | 68.4.1 |
| canonical ubuntu_linux | 16.04 | — |
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