CVE-2019-9791

Spidermonkey - IonMonkey Type Inference is Incorrect for Constructors Entered via OSR

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

El sistema de inferencia de tipos permite la recopilación de funciones que pueden generar confusiones de tipo entre objetos arbitrarios cuando se compilan por medio del compilador IonMonkey just-in-time (JIT) y cuando se ingresa a la función constructor mediante el reemplazo en la pila (OSR). Esto permite una posible lectura y escritura arbitrarias de objetos durante un bloqueo explotable. Esta vulnerabilidad afecta a Thunderbird versiones <60.6, Firefox ESR versiones <60.6 y Firefox versiones <66.

A bug in IonMonkeys type inference system when JIT compiling and entering a constructor function via on-stack replacement (OSR) allows the compilation of JITed functions that cause type confusions between arbitrary objects.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-03-14 CVE Reserved
2019-03-20 CVE Published
2019-03-26 First Exploit
2024-08-04 CVE Updated
2024-09-16 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')

CAPEC

References (10)

URL	Tag	Source

URL	Date	SRC
https://www.exploit-db.com/exploits/46613	2019-03-26
https://github.com/Sp0pielar/CVE-2019-9791	2021-09-08
https://bugzilla.mozilla.org/show_bug.cgi?id=1530958	2024-08-04

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2019:0966	2022-03-30
https://access.redhat.com/errata/RHSA-2019:1144	2022-03-30
https://www.mozilla.org/security/advisories/mfsa2019-07	2022-03-30
https://www.mozilla.org/security/advisories/mfsa2019-08	2022-03-30
https://www.mozilla.org/security/advisories/mfsa2019-11	2022-03-30
https://access.redhat.com/security/cve/CVE-2019-9791	2019-05-13
https://bugzilla.redhat.com/show_bug.cgi?id=1690676	2019-05-13

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Mozilla Search vendor "Mozilla"		Firefox Search vendor "Mozilla" for product "Firefox"				< 66.0 Search vendor "Mozilla" for product "Firefox" and version " < 66.0"		-		Affected
Mozilla Search vendor "Mozilla"		Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"				< 60.6.0 Search vendor "Mozilla" for product "Firefox Esr" and version " < 60.6.0"		-		Affected
Mozilla Search vendor "Mozilla"		Thunderbird Search vendor "Mozilla" for product "Thunderbird"				< 60.6.0 Search vendor "Mozilla" for product "Thunderbird" and version " < 60.6.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus"				8.1 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.1"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus"				8.2 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.2"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus"				8.4 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.4"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus"				8.2 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "8.2"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus"				8.4 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "8.4"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus"				8.2 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "8.2"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus"				8.4 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "8.4"		-		Affected