Google Chrome prior 94.0.4606.54 Blink memory corruption

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
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.
6.0$5k-$25k0.00

Summaryinfo

A vulnerability was found in Google Chrome and classified as critical. Affected by this vulnerability is an unknown functionality of the component Blink. Executing a manipulation can lead to memory corruption. This vulnerability appears as CVE-2021-4318. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Google Chrome (Web Browser). It has been declared as critical. This vulnerability affects an unknown code of the component Blink. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Object corruption in Blink in Google Chrome prior to 94.0.4606.54 allowed a remote attacker to potentially exploit object corruption via a crafted HTML page. (Chromium security severity: High)

The weakness was presented 07/29/2023. The advisory is shared for download at chromereleases.googleblog.com. This vulnerability was named CVE-2021-4318 since 02/12/2023. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 07/29/2023). It is expected to see the exploit prices for this product increasing in the near future.

Upgrading to version 94.0.4606.54 eliminates this vulnerability. The upgrade is hosted for download at chromereleases.googleblog.com.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

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

CVSSv2info

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

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Chrome 94.0.4606.54

Timelineinfo

02/12/2023 🔍
07/29/2023 +166 days 🔍
07/29/2023 +0 days 🔍
08/23/2023 +25 days 🔍

Sourcesinfo

Vendor: google.com
Product: google.com

Advisory: FEDORA-2023-ea7128b5ce
Status: Confirmed

CVE: CVE-2021-4318 (🔍)
GCVE (CVE): GCVE-0-2021-4318
GCVE (VulDB): GCVE-100-235708

Entryinfo

Created: 07/29/2023 06:36
Updated: 08/23/2023 09:23
Changes: 07/29/2023 06:36 (42), 08/23/2023 09:23 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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