ZDI-CAN-21164: Linux Kernel ksmbd Out-Of-Bounds Read Information Disclosure Vulnerability
First published: Thu Jul 20 2023(Updated: )
This vulnerability allows remote attackers to disclose sensitive information on affected installations of Linux Kernel. Authentication may or may not be required to exploit this vulnerability, depending upon configuration. Furthermore, only systems with ksmbd enabled are vulnerable. The specific flaw exists within the parsing of smb2_hdr structure. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the kernel.
| Affected Software | Affected Version | How to fix |
|---|---|---|
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is ZDI-CAN-21164?
ZDI-CAN-21164 is a vulnerability found in the Linux Kernel that allows remote attackers to disclose sensitive information.
How severe is ZDI-CAN-21164?
ZDI-CAN-21164 has a severity rating of 7.1, which is considered high.
Is authentication required to exploit ZDI-CAN-21164?
Authentication may or may not be required to exploit ZDI-CAN-21164, depending on the configuration.
Which systems are vulnerable to ZDI-CAN-21164?
Only systems with ksmbd enabled are vulnerable to ZDI-CAN-21164.
How can I fix ZDI-CAN-21164?
To fix ZDI-CAN-21164, it is recommended to apply the latest security patches or updates provided by Linux Kernel.
- agent/description
- agent/event
- agent/first-publish-date
- agent/last-modified-date
- agent/references
- agent/severity
- agent/softwarecombine
- agent/tags
- agent/title
- collector/zdi-advisory
- source/ZDI
- alias/ZDI-23-980
- alias/ZDI-CAN-21164
- alias/CVE-2023-3865
- agent/software-canonical-lookup
- collector/zdi-published
- vendor/linux
- canonical/linux kernel