CVE-2023-38431
First published: Tue Jul 18 2023(Updated: )
An issue was discovered in the Linux kernel before 6.3.8. fs/smb/server/connection.c in ksmbd does not validate the relationship between the NetBIOS header's length field and the SMB header sizes, via pdu_size in ksmbd_conn_handler_loop, leading to an out-of-bounds read.
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <6.3.8 | |
| Linux Kernel | >=5.15<5.15.145 | |
| Linux Kernel | >=5.16<6.1.34 | |
| Linux Kernel | >=6.2<6.3.8 | |
| NetApp SolidFire & HCI Management Node | ||
| NetApp H300S Firmware | ||
| NetApp H410S Firmware | ||
| NetApp H500e Firmware | ||
| NetApp H700S | ||
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.128-1 6.12.20-1 6.12.21-1 |
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Reference Links
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/smb/server?id=368ba06881c395f1c9a7ba22203cf8d78b4addc0
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.8
- https://security.netapp.com/advisory/ntap-20230824-0011/
- https://launchpad.net/bugs/cve/CVE-2023-38431
- https://git.kernel.org/linus/368ba06881c395f1c9a7ba22203cf8d78b4addc0
- https://security-tracker.debian.org/tracker/CVE-2023-38431
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-38431
- https://nvd.nist.gov/vuln/detail/CVE-2023-38431
- https://ubuntu.com/security/CVE-2023-38431
Frequently Asked Questions
What is the severity of CVE-2023-38431?
CVE-2023-38431 has a high severity rating due to the out-of-bounds read vulnerability in the Linux kernel's ksmbd component.
How do I fix CVE-2023-38431?
To fix CVE-2023-38431, it is recommended to update the Linux kernel to versions 5.15.145, 6.1.34, or 6.3.8 and later.
What versions of the Linux kernel are affected by CVE-2023-38431?
CVE-2023-38431 affects Linux kernel versions before 6.3.8, specifically those in the ranges 5.15.x and 5.16.x to 6.2.x.
Are there any specific products that CVE-2023-38431 affects?
Yes, CVE-2023-38431 also affects various NetApp hardware including the SolidFire & HCI Management Node and the H300s, H410s, H500s, and H700s models.
What is the potential impact of CVE-2023-38431?
The potential impact of CVE-2023-38431 includes unauthorized reading of memory data, which could lead to exposure of sensitive information.
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