Google Chrome up to 84.0.4147.105 Extension use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.3$5k-$25k0.00

Summaryinfo

A vulnerability classified as critical has been found in Google Chrome. This issue affects some unknown processing of the component Extension. The manipulation leads to use after free. This vulnerability is uniquely identified as CVE-2020-6554. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Google Chrome (Web Browser). This issue affects some unknown processing of the component Extension. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Use after free in extensions in Google Chrome prior to 84.0.4147.125 allowed a remote attacker to potentially perform a sandbox escape via a crafted Chrome Extension.

The weakness was disclosed 08/10/2020 as Stable Channel Update for Desktop - August 2020 (Website). The advisory is shared at chromereleases.googleblog.com. The advisory contains:

This update includes 15 security fixes.
The identification of this vulnerability is CVE-2020-6554. 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. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 10/14/2024). It is expected to see the exploit prices for this product increasing in the near future.

The vulnerability scanner Nessus provides a plugin with the ID 208603 (CentOS 6 : chromium-browser (RHSA-2020:3560)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 84.0.4147.125 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (208603). us-cert.cisa.gov is providing further details. The entries VDB-159965, VDB-159966, VDB-159967 and VDB-159968 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.3

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

NVD Base Score: 8.6
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: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 208603
Nessus Name: CentOS 6 : chromium-browser (RHSA-2020:3560)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Chrome 84.0.4147.125

Timelineinfo

01/08/2020 🔍
08/10/2020 +215 days 🔍
08/10/2020 +0 days 🔍
08/17/2020 +7 days 🔍
05/05/2025 +1722 days 🔍

Sourcesinfo

Vendor: google.com
Product: google.com

Advisory: Stable Channel Update for Desktop - August 2020
Status: Confirmed

CVE: CVE-2020-6554 (🔍)
GCVE (CVE): GCVE-0-2020-6554
GCVE (VulDB): GCVE-100-159977
Misc.: 🔍
See also: 🔍

Entryinfo

Created: 08/17/2020 21:33
Updated: 05/05/2025 05:18
Changes: 08/17/2020 21:33 (45), 08/17/2020 21:38 (17), 11/10/2020 09:05 (1), 10/14/2024 11:23 (19), 05/05/2025 05:18 (3)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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