CVE-2023-32252: Linux Kernel ksmbd Session NULL Pointer Dereference Denial-of-Service Vulnerability
First published: Wed Jul 05 2023(Updated: )
A flaw was found in the Linux kernel's ksmbd, a high-performance in-kernel SMB server. The specific flaw exists within the handling of SMB2_LOGOFF commands. The issue results from the lack of proper validation of a pointer prior to accessing it. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <6.4 | 6.4 |
| Red Hat Kernel-devel | ||
| Linux Kernel | <=6.3.9 | |
| Linux Kernel | >=5.15<5.15.145 | |
| Linux Kernel | >=5.16<6.1.29 | |
| Linux Kernel | >=6.2<6.2.16 | |
| Linux Kernel | >=6.3<6.3.2 | |
| All of | ||
| NetApp H300S Firmware | ||
| NetApp H300S Firmware | ||
| All of | ||
| NetApp H500e Firmware | ||
| NetApp H500e Firmware | ||
| All of | ||
| NetApp H700S | ||
| NetApp H700S | ||
| All of | ||
| NetApp H410S Firmware | ||
| NetApp H410S | ||
| All of | ||
| NetApp H410C Firmware | ||
| NetApp H410C | ||
| debian/linux | 5.10.223-1 5.10.234-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.17-1 |
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Reference Links
- https://www.zerodayinitiative.com/advisories/ZDI-CAN-20590/
- https://bugzilla.redhat.com/show_bug.cgi?id=2219815
- https://access.redhat.com/security/cve/CVE-2023-32252
- https://security.netapp.com/advisory/ntap-20231124-0001/
- https://launchpad.net/bugs/cve/CVE-2023-32252
- https://github.com/torvalds/linux/commit/f5c779b7ddbda30866cf2a27c63e34158f858c73
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-32252
- https://nvd.nist.gov/vuln/detail/CVE-2023-32252
- https://security-tracker.debian.org/tracker/CVE-2023-32252
- https://ubuntu.com/security/CVE-2023-32252
- https://git.kernel.org/linus/f5c779b7ddbda30866cf2a27c63e34158f858c73
Frequently Asked Questions
What is the severity of CVE-2023-32252?
CVE-2023-32252 has a high severity rating due to the potential for remote code execution via improperly validated SMB2_LOGOFF commands.
How do I fix CVE-2023-32252?
To remediate CVE-2023-32252, update the Linux kernel to version 6.4 or higher, or to specific patched versions listed by your distribution.
Which Linux kernel versions are affected by CVE-2023-32252?
CVE-2023-32252 affects Linux kernel versions from 5.15 to 6.3.9, and all versions below 6.4.
What types of attacks can exploit CVE-2023-32252?
An attacker can exploit CVE-2023-32252 to execute remote code by sending crafted SMB2_LOGOFF commands.
Is the Linux kernel's ksmbd the only affected component in CVE-2023-32252?
Yes, the specific vulnerability in CVE-2023-32252 is related solely to the ksmbd component of the Linux kernel.
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