0.0
NA
CVE-2024-42304
"村 Martix ext4 Directory Hole Read Corner Case Vulnerability"
Description

In the Linux kernel, the following vulnerability has been resolved: ext4: make sure the first directory block is not a hole The syzbot constructs a directory that has no dirblock but is non-inline, i.e. the first directory block is a hole. And no errors are reported when creating files in this directory in the following flow. ext4_mknod ... ext4_add_entry // Read block 0 ext4_read_dirblock(dir, block, DIRENT) bh = ext4_bread(NULL, inode, block, 0) if (!bh && (type == INDEX || type == DIRENT_HTREE)) // The first directory block is a hole // But type == DIRENT, so no error is reported. After that, we get a directory block without '.' and '..' but with a valid dentry. This may cause some code that relies on dot or dotdot (such as make_indexed_dir()) to crash. Therefore when ext4_read_dirblock() finds that the first directory block is a hole report that the filesystem is corrupted and return an error to avoid loading corrupted data from disk causing something bad.

INFO

Published Date :

Aug. 17, 2024, 9:15 a.m.

Last Modified :

Aug. 19, 2024, 12:59 p.m.

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Remotely Exploitable :

No

Impact Score :

Exploitability Score :

Affected Products

The following products are affected by CVE-2024-42304 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2024-42304.

URL Resource
https://git.kernel.org/stable/c/299bc6ffa57e04e74c6cce866d6c0741fb4897a1
https://git.kernel.org/stable/c/9771e3d8365ae1dd5e8846a204cb9af14e3e656a
https://git.kernel.org/stable/c/b609753cbbd38f8c0affd4956c0af178348523ac
https://git.kernel.org/stable/c/c3893d9de8ee153baac56d127d844103488133b5
https://git.kernel.org/stable/c/d81d7e347d1f1f48a5634607d39eb90c161c8afe
https://git.kernel.org/stable/c/de2a011a13a46468a6e8259db58b1b62071fe136
https://git.kernel.org/stable/c/e02f9941e8c011aa3eafa799def6a134ce06bcfa
https://git.kernel.org/stable/c/f9ca51596bbfd0f9c386dd1c613c394c78d9e5e6

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2024-42304 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2024-42304 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 19, 2024

    Action Type Old Value New Value
    Added Reference kernel.org https://git.kernel.org/stable/c/d81d7e347d1f1f48a5634607d39eb90c161c8afe [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/e02f9941e8c011aa3eafa799def6a134ce06bcfa [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/de2a011a13a46468a6e8259db58b1b62071fe136 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/9771e3d8365ae1dd5e8846a204cb9af14e3e656a [No types assigned]
  • CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2024

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: ext4: make sure the first directory block is not a hole The syzbot constructs a directory that has no dirblock but is non-inline, i.e. the first directory block is a hole. And no errors are reported when creating files in this directory in the following flow. ext4_mknod ... ext4_add_entry // Read block 0 ext4_read_dirblock(dir, block, DIRENT) bh = ext4_bread(NULL, inode, block, 0) if (!bh && (type == INDEX || type == DIRENT_HTREE)) // The first directory block is a hole // But type == DIRENT, so no error is reported. After that, we get a directory block without '.' and '..' but with a valid dentry. This may cause some code that relies on dot or dotdot (such as make_indexed_dir()) to crash. Therefore when ext4_read_dirblock() finds that the first directory block is a hole report that the filesystem is corrupted and return an error to avoid loading corrupted data from disk causing something bad.
    Added Reference kernel.org https://git.kernel.org/stable/c/b609753cbbd38f8c0affd4956c0af178348523ac [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/c3893d9de8ee153baac56d127d844103488133b5 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/299bc6ffa57e04e74c6cce866d6c0741fb4897a1 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/f9ca51596bbfd0f9c386dd1c613c394c78d9e5e6 [No types assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2024-42304 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2024-42304 weaknesses.

NONE - Vulnerability Scoring System
: