Apple macOS up to 10.14.3 Kernel buffer overflow

Summaryinfo

A vulnerability has been found in Apple macOS up to 10.14.3 and classified as critical. The impacted element is an unknown function of the component Kernel. The manipulation leads to buffer overflow. This vulnerability is traded as CVE-2019-8508. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Apple macOS up to 10.14.3 (Operating System) and classified as very critical. This issue affects an unknown part of the component Kernel. 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. The summary by CVE is:

A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Mojave 10.14.4. Mounting a maliciously crafted NFS network share may lead to arbitrary code execution with system privileges.

The bug was discovered 03/25/2019. The weakness was shared 03/25/2019 by dr. as HT209600 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. The identification of this vulnerability is CVE-2019-8508 since 02/18/2019. The attack may be initiated remotely. No form of authentication is needed for a successful 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 06/08/2024). It is expected to see the exploit prices for this product increasing in the near future. The advisory points out:

A buffer overflow was addressed with improved bounds checking.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 371712 (Apple macOS Mojave 10.14.4, Security Update 2019-002 High Sierra, Security Update 2019-002 Sierra Not Installed (APPLE-SA-2019-3-25-2)).

Upgrading to version 10.14.4 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The entries VDB-132341, VDB-132342, VDB-132343 and VDB-132344 are related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Apple

Name

• macOS

Version

• 10.14.0
• 10.14.1
• 10.14.2
• 10.14.3

License

• commercial

Website

• Vendor: https://www.apple.com/

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

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