CVE-2023-39179: Linux Kernel ksmbd Read Request Out-Of-Bounds Read Information Disclosure Vulnerability
A flaw was found within the handling of SMB2 read requests in the kernel ksmbd module. 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 to disclose sensitive information on affected installations of Linux. Only systems with ksmbd enabled are vulnerable to this CVE.
Other sources
This vulnerability allows remote attackers to disclose sensitive information on affected installations of Linux Kernel. Authentication is not required to exploit this vulnerability. However, only systems with ksmbd enabled are vulnerable.
The specific flaw exists within the handling of SMB2 read requests. 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.
Reference: https://www.zerodayinitiative.com/advisories/ZDI-24-588/
— Red Hat
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2023-39179?
CVE-2023-39179 has been classified as a critical severity vulnerability due to its potential to disclose sensitive information.
How do I fix CVE-2023-39179?
To fix CVE-2023-39179, update the Linux Kernel to the latest version where the vulnerability has been patched.
What types of data could be compromised by CVE-2023-39179?
CVE-2023-39179 could allow an attacker to disclose sensitive data from a system affected by the flaw.
What versions of the Linux Kernel are affected by CVE-2023-39179?
CVE-2023-39179 affects multiple versions of the Linux Kernel, particularly those utilizing the ksmbd module.
Is CVE-2023-39179 exploitative in the wild?
There is currently no public information indicating that CVE-2023-39179 is actively being exploited in the wild.