Apple iOS/iPadOS up to 15.1.1 IOMobileFrameBuffer buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.7$5k-$25k0.00

Summaryinfo

A vulnerability described as critical has been identified in Apple iOS and iPadOS up to 15.1.1. This affects an unknown part of the component IOMobileFrameBuffer. Such manipulation leads to buffer overflow. This vulnerability is traded as CVE-2021-30983. An attack has to be approached locally. Furthermore, there is an exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Apple iOS and iPadOS up to 15.1.1 (Smartphone Operating System) and classified as critical. Affected by this issue is an unknown code block of the component IOMobileFrameBuffer. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 15.2 and iPadOS 15.2. An application may be able to execute arbitrary code with kernel privileges.

The weakness was shared 12/13/2021 by Pangu as HT212976 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability is handled as CVE-2021-30983. Technical details are unknown but an exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 03/08/2026). It is expected to see the exploit prices for this product increasing in the near future. The advisory points out:

An application may be able to execute arbitrary code with kernel privileges

It is declared as attacked. This issue was added on 06/27/2022 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 07/18/2022:

Apply updates per vendor instructions.

Upgrading to version 15.2 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

A buffer overflow issue was addressed with improved memory handling.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2022-0489). Once again VulDB remains the best source for vulnerability data.

Affected

  • Apple iPad
  • Apple iPhone
  • Apple iOS
  • Apple iPadOS

Productinfo

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Version

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Website

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: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Attacked

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: iOS/iPadOS 15.2

Timelineinfo

04/13/2021 🔍
12/13/2021 +244 days 🔍
12/13/2021 +0 days 🔍
12/17/2021 +4 days 🔍
03/08/2026 +1542 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT212976
Researcher: Pangu
Status: Confirmed

CVE: CVE-2021-30983 (🔍)
GCVE (CVE): GCVE-0-2021-30983
GCVE (VulDB): GCVE-100-188564
CERT Bund: WID-SEC-2022-0489 - Apple iOS: Mehrere Schwachstellen

scip Labs: https://www.scip.ch/en/?labs.20150917

Entryinfo

Created: 12/17/2021 16:42
Updated: 03/08/2026 14:31
Changes: 12/17/2021 16:42 (20), 12/17/2021 16:46 (27), 12/23/2021 09:34 (1), 04/27/2024 09:46 (26), 06/28/2024 22:58 (19), 09/23/2024 11:38 (1), 01/30/2025 02:34 (10), 03/08/2026 14:31 (6)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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