Linux Kernel 4.15.0 ntfs.ko Filesystem Driver ntfs_read_locked_inode use after free

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel 4.15.0. The impacted element is the function ntfs_read_locked_inode of the component ntfs.ko Filesystem Driver. The manipulation results in use after free. This vulnerability is reported as CVE-2018-12929. The attack requires a local approach. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel 4.15.0 (Operating System). Affected is the function ntfs_read_locked_inode of the component ntfs.ko Filesystem Driver. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

ntfs_read_locked_inode in the ntfs.ko filesystem driver in the Linux kernel 4.15.0 allows attackers to trigger a use-after-free read and possibly cause a denial of service (kernel oops or panic) via a crafted ntfs filesystem.

The bug was discovered 04/12/2018. The weakness was disclosed 06/28/2018 by arma (Website). The advisory is shared for download at securityfocus.com. This vulnerability is traded as CVE-2018-12929 since 06/28/2018. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/29/2023).

The vulnerability was handled as a non-public zero-day exploit for at least 77 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 104588†). The entries VDB-120073 and VDB-120074 are pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.15.0

License

• open-source

Website

• Vendor: https://www.kernel.org/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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