Mozilla Firefox/Firefox ESR/Thunderbird IonMonkey JIT Compiler type confusion

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Mozilla Firefox, Firefox ESR and Thunderbird. Affected by this issue is some unknown functionality of the component IonMonkey JIT Compiler. The manipulation leads to type confusion. This vulnerability is uniquely identified as CVE-2019-17026. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Firefox, Firefox ESR and Thunderbird (Web Browser) (affected version unknown). It has been rated as critical. This issue affects an unknown functionality of the component IonMonkey JIT Compiler. The manipulation with an unknown input leads to a type confusion vulnerability. Using CWE to declare the problem leads to CWE-843. 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was disclosed 03/02/2020. The identification of this vulnerability is CVE-2019-17026 since 09/30/2019. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/02/2020).

The CISA Known Exploited Vulnerabilities Catalog lists this issue since 11/03/2021 with a due date of 05/03/2022:

Apply updates per vendor instructions.

Upgrading eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Type confusion
CWE: CWE-843
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/30/2019 🔍
03/02/2020 +154 days 🔍
03/02/2020 +0 days 🔍
05/11/2025 +1895 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: 162568
Status: Confirmed

CVE: CVE-2019-17026 (🔍)
GCVE (CVE): GCVE-0-2019-17026
GCVE (VulDB): GCVE-100-150767

Entryinfo

Created: 03/02/2020 12:46
Updated: 05/11/2025 00:45
Changes: 03/02/2020 12:46 (36), 03/02/2020 12:51 (18), 04/07/2024 16:20 (19), 04/07/2024 16:27 (2), 05/11/2025 00:45 (5)
Complete: 🔍
Cache ID: 216::103

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