CVE-2021-21198

Chrome Legacy ipc::Message Passed Via Shared Memory

Severity Score

7.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Out of bounds read in IPC in Google Chrome prior to 89.0.4389.114 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.

Una lectura fuera de límites en IPC en Google Chrome versiones anteriores a 89.0.4389.114, permitía a un atacante remoto que había comprometido el proceso del renderizador llevar a cabo potencialmente un escape del sandbox por medio de una página HTML diseñada

Looking at the Mojo implementation of Chrome's legacy IPC, the legacy ipc::Message type is transferred inside a BigBuffer.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-12-21 CVE Reserved
2021-04-09 CVE Published
2023-12-24 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-125: Out-of-bounds Read

CAPEC

References (6)

URL	Tag	Source
http://packetstormsecurity.com/files/162973/Chrome-Legacy-ipc-Message-Passed-Via-Shared-Memory.html	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://chromereleases.googleblog.com/2021/03/stable-channel-update-for-desktop_30.html	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A	2023-11-07
https://security.gentoo.org/glsa/202104-08	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Google Search vendor "Google"		Chrome Search vendor "Google" for product "Chrome"				< 89.0.4389.114 Search vendor "Google" for product "Chrome" and version " < 89.0.4389.114"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				32 Search vendor "Fedoraproject" for product "Fedora" and version "32"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				33 Search vendor "Fedoraproject" for product "Fedora" and version "33"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected