Apple Safari up to 13.1.1 WebKit memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Apple Safari up to 13.1.1. It has been classified as critical. This vulnerability affects unknown code of the component WebKit. Performing a manipulation results in memory corruption. This vulnerability is reported as CVE-2020-9894. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Apple Safari up to 13.1.1 (Web Browser). It has been classified as critical. This affects an unknown code block of the component WebKit. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was disclosed 07/15/2020 by 0011 with Zero Day Initiative as HT211292 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is uniquely identified as CVE-2020-9894. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/07/2025). The advisory points out:

An out-of-bounds read was addressed with improved input validation.

The vulnerability scanner Nessus provides a plugin with the ID 241427 (RHEL 7 : webkitgtk4 (RHSA-2025:10364)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 13.1.2 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 (241427). The entries VDB-158596, VDB-158616, VDB-158636 and VDB-158664 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for 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: 5.3
VulDB Meta Temp Score: 5.2

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

NVD Base Score: 4.3
NVD Vector: 🔍

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: 241427
Nessus Name: RHEL 7 : webkitgtk4 (RHSA-2025:10364)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Safari 13.1.2

Timelineinfo

03/02/2020 🔍
07/15/2020 +135 days 🔍
07/15/2020 +0 days 🔍
07/17/2020 +2 days 🔍
07/07/2025 +1816 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT211292
Researcher: 0011
Organization: Zero Day Initiative
Status: Confirmed

CVE: CVE-2020-9894 (🔍)
GCVE (CVE): GCVE-0-2020-9894
GCVE (VulDB): GCVE-100-158667
See also: 🔍

Entryinfo

Created: 07/17/2020 07:54
Updated: 07/07/2025 20:10
Changes: 07/17/2020 07:54 (46), 07/17/2020 07:59 (2), 11/04/2020 06:59 (2), 11/04/2020 07:07 (8), 07/07/2025 20:10 (19)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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