Apple Safari up to 14.1.2 WebKit memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$5k-$25k0.00

Summaryinfo

A vulnerability was found in Apple Safari up to 14.1.2. It has been declared as critical. This issue affects some unknown processing of the component WebKit. Executing a manipulation can lead to memory corruption. The identification of this vulnerability is CVE-2021-30846. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Apple Safari up to 14.1.2 (Web Browser) and classified as critical. This vulnerability affects some unknown processing of the component WebKit. 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.

The weakness was shared 09/20/2021 by Sergei Glazunov as HT212816 as confirmed advisory (Website). The advisory is available at support.apple.com. This vulnerability was named CVE-2021-30846. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 05/22/2025). The advisory points out:

Processing maliciously crafted web content may lead to arbitrary code execution

The vulnerability scanner Nessus provides a plugin with the ID 236537 (Alibaba Cloud Linux 3 : 0162: webkit2gtk3 (ALINUX3-SA-2022:0162)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 15.0 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

A memory corruption issue was addressed with improved memory handling.

The vulnerability is also documented in the vulnerability database at Tenable (236537). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Vendor

Name

Version

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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Nessus ID: 236537
Nessus Name: Alibaba Cloud Linux 3 : 0162: webkit2gtk3 (ALINUX3-SA-2022:0162)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Safari 15.0

Timelineinfo

04/13/2021 🔍
09/20/2021 +160 days 🔍
09/20/2021 +0 days 🔍
09/21/2021 +1 days 🔍
05/22/2025 +1339 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT212816
Researcher: Sergei Glazunov
Status: Confirmed

CVE: CVE-2021-30846 (🔍)
GCVE (CVE): GCVE-0-2021-30846
GCVE (VulDB): GCVE-100-183154

Entryinfo

Created: 09/21/2021 12:41
Updated: 05/22/2025 03:56
Changes: 09/21/2021 12:41 (19), 09/21/2021 12:44 (27), 09/30/2021 20:40 (1), 05/22/2025 03:56 (16)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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