CVE-2020-12417

Mozilla: Memory corruption due to missing sign-extension for ValueTags on ARM64

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier, resulting in memory corruption and a potentially exploitable crash. *Note: this issue only affects Firefox on ARM64 platforms.* This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.

Debido a una confusión acerca de ValueTags en objetos JavaScript, un objeto puede pasar a través de la barrera de tipo, resultando en una corrupción de la memoria y un bloqueo potencialmente explotable. *Nota: este problema solo afecta a Firefox en las plataformas ARM64. * Esta vulnerabilidad afecta a Firefox ESR versiones anteriores a 68.10, Firefox versiones anteriores a 78 y Thunderbird versiones anteriores a 68.10.0

The Mozilla Foundation Security Advisory describes this flaw as:

Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier, resulting in memory corruption and a potentially exploitable crash.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-04-28 CVE Reserved
2020-07-06 CVE Published
2024-06-15 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-617: Reachable Assertion
CWE-681: Incorrect Conversion between Numeric Types
CWE-787: Out-of-bounds Write

CAPEC

References (13)

URL	Tag	Source

URL	Date	SRC
https://bugzilla.mozilla.org/show_bug.cgi?id=1640737	2024-08-04

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.html	2022-05-03
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.html	2022-05-03
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html	2022-05-03
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html	2022-05-03
https://security.gentoo.org/glsa/202007-09	2022-05-03
https://security.gentoo.org/glsa/202007-10	2022-05-03
https://usn.ubuntu.com/4421-1	2022-05-03
https://www.mozilla.org/security/advisories/mfsa2020-24	2022-05-03
https://www.mozilla.org/security/advisories/mfsa2020-25	2022-05-03
https://www.mozilla.org/security/advisories/mfsa2020-26	2022-05-03
https://access.redhat.com/security/cve/CVE-2020-12417	2020-07-21
https://bugzilla.redhat.com/show_bug.cgi?id=1853014	2020-07-21

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"				< 78.0 Search vendor "Mozilla" for product "Firefox" and version " < 78.0"		-		Affected
Mozilla Search vendor "Mozilla"		Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"				< 68.10.0 Search vendor "Mozilla" for product "Firefox Esr" and version " < 68.10.0"		-		Affected
Mozilla Search vendor "Mozilla"		Thunderbird Search vendor "Mozilla" for product "Thunderbird"				< 68.10.0 Search vendor "Mozilla" for product "Thunderbird" and version " < 68.10.0"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"		esm		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				19.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "19.10"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				20.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "20.04"		lts		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				15.1 Search vendor "Opensuse" for product "Leap" and version "15.1"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				15.2 Search vendor "Opensuse" for product "Leap" and version "15.2"		-		Affected