CVE-2023-32247: Linux Kernel ksmbd Session Setup Memory Exhaustion 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_SESSION_SETUP commands. The issue results from the lack of control of resource consumption. 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 |
| 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 | |
| netapp h300s | ||
| netapp h410s | ||
| netapp h500s | ||
| netapp h700s | ||
| Linux Kernel | <=6.3.9 | |
| Linux kernel | ||
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=2219803
- https://www.zerodayinitiative.com/advisories/ZDI-CAN-20478/
- https://access.redhat.com/security/cve/CVE-2023-32247
- https://security.netapp.com/advisory/ntap-20230915-0011/
- https://launchpad.net/bugs/cve/CVE-2023-32247
- https://github.com/torvalds/linux/commit/ea174a91893956450510945a0c5d1a10b5323656
- https://git.kernel.org/linus/ea174a91893956450510945a0c5d1a10b5323656
- https://security-tracker.debian.org/tracker/CVE-2023-32247
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-32247
- https://nvd.nist.gov/vuln/detail/CVE-2023-32247
- https://ubuntu.com/security/CVE-2023-32247
Frequently Asked Questions
What is the severity of CVE-2023-32247?
CVE-2023-32247 has been rated as high severity due to its potential for resource exhaustion and denial of service attacks.
How do I fix CVE-2023-32247?
To mitigate CVE-2023-32247, update the Linux kernel to version 6.4 or apply appropriate patches provided by your distribution.
What versions of the Linux kernel are affected by CVE-2023-32247?
CVE-2023-32247 affects Linux kernel versions between 5.15.0 and 6.3.9, and also some specific versions of minor releases.
Can CVE-2023-32247 be exploited remotely?
Yes, an attacker can exploit CVE-2023-32247 remotely through specially crafted SMB2_SESSION_SETUP commands.
Which Linux distributions are impacted by CVE-2023-32247?
CVE-2023-32247 impacts multiple Linux distributions that utilize the affected kernel versions, including those based on Red Hat and Debian.
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