Apple macOS IOMobileFrameBuffer memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Apple macOS. It has been rated as critical. This impacts an unknown function of the component IOMobileFrameBuffer. Performing a manipulation results in memory corruption. This vulnerability is identified as CVE-2021-30807. The attack is only possible with local access. Additionally, an exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in Apple macOS (Operating System) (version unknown). This affects an unknown function of the component IOMobileFrameBuffer. 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 released 07/26/2021 as confirmed advisory (Website). This vulnerability is uniquely identified as CVE-2021-30807 since 04/13/2021. The exploitability is told to be easy. Attacking locally is a requirement. The successful exploitation requires a authentication. Technical details are unknown but a public exploit is available.

A public exploit has been developed by Saar Amar in Objective-C and been published immediately after the advisory. The exploit is shared for download at saaramar.github.io. It is declared as attacked. We expect the 0-day to have been worth approximately $5k-$25k. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 11/03/2021 with a due date of 11/17/2021:

Apply updates per vendor instructions.

Upgrading 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 Zero-Day.cz (654). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.7

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 7.8
CNA Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Access: Public
Status: Attacked
Author: Saar Amar
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
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KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Zero-Day.cz: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

04/13/2021 🔍
07/26/2021 +104 days 🔍
07/26/2021 +0 days 🔍
07/26/2021 +0 days 🔍
10/19/2021 +85 days 🔍
01/30/2025 +1199 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: support.apple.com
Status: Confirmed

CVE: CVE-2021-30807 (🔍)
GCVE (CVE): GCVE-0-2021-30807
GCVE (VulDB): GCVE-100-184611
scip Labs: https://www.scip.ch/en/?labs.20180712

Entryinfo

Created: 10/19/2021 18:29
Updated: 01/30/2025 02:49
Changes: 10/19/2021 18:29 (40), 10/23/2021 01:33 (11), 10/23/2021 01:40 (17), 04/21/2024 17:42 (23), 06/25/2024 20:36 (2), 09/15/2024 00:30 (1), 01/30/2025 02:49 (11)
Complete: 🔍
Cache ID: 216::103

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