Apple iOS/iPadOS up to 14.4.2 CoreText memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.1$5k-$25k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Apple iOS and iPadOS up to 14.4.2. This impacts an unknown function of the component CoreText. Such manipulation leads to memory corruption. This vulnerability is referenced as CVE-2021-1811. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple iOS and iPadOS up to 14.4.2 (Smartphone Operating System) and classified as problematic. Affected by this issue is an unknown functionality of the component CoreText. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality.

The weakness was published 04/26/2021 by Xingwei Lin as HT212317 as confirmed advisory (Website). The advisory is available at support.apple.com. This vulnerability is handled as CVE-2021-1811. 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 04/30/2021). It is expected to see the exploit prices for this product increasing in the near future. The advisory points out:

Processing a maliciously crafted font may result in the disclosure of process memory

Upgrading to version 14.5 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

A logic issue was addressed with improved state management.

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: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
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: 🔍

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

Upgrade: iOS/iPadOS 14.5

Timelineinfo

12/08/2020 🔍
04/26/2021 +138 days 🔍
04/26/2021 +0 days 🔍
04/27/2021 +1 days 🔍
04/30/2021 +3 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT212317
Researcher: Xingwei Lin
Status: Confirmed

CVE: CVE-2021-1811 (🔍)
GCVE (CVE): GCVE-0-2021-1811
GCVE (VulDB): GCVE-100-173930
scip Labs: https://www.scip.ch/en/?labs.20150917

Entryinfo

Created: 04/27/2021 07:57
Updated: 04/30/2021 10:51
Changes: 04/27/2021 07:57 (18), 04/27/2021 08:00 (29), 04/30/2021 10:51 (4)
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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