Apple iOS up to 12.3.2 Telephony input validation

Summaryinfo

A vulnerability, which was classified as critical, has been found in Apple iOS up to 12.3.2. Impacted is an unknown function of the component Telephony. The manipulation leads to input validation. This vulnerability is documented as CVE-2019-8699. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple iOS up to 12.3.2 (Smartphone Operating System). It has been rated as critical. This issue affects an unknown functionality of the component Telephony. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A logic issue existed in the handling of answering phone calls. The issue was addressed with improved state management. This issue is fixed in iOS 12.4. The initiator of a phone call may be able to cause the recipient to answer a simultaneous Walkie-Talkie connection.

The weakness was released 07/22/2019 by Alex as HT210346 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. The identification of this vulnerability is CVE-2019-8699 since 02/18/2019. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/11/2020). It is expected to see the exploit prices for this product increasing in the near future. The advisory points out:

A logic issue existed in the answering of phone calls. The issue was addressed with improved state management.

Upgrading to version 12.4 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

Entries connected to this vulnerability are available at VDB-138659, VDB-138660, VDB-138661 and VDB-138662. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Smartphone Operating System

Vendor

• Apple

Name

• iOS

Version

• 12.3.0
• 12.3.1
• 12.3.2

License

• commercial

Website

• Vendor: https://www.apple.com/

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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