Bug 2326529 (CVE-2023-39179) - CVE-2023-39179 kernel: ksmbd: Read Request Out-Of-Bounds Read Information Disclosure Vulnerability
Summary: CVE-2023-39179 kernel: ksmbd: Read Request Out-Of-Bounds Read Information Dis...
Keywords:
Status: NEW
Alias: CVE-2023-39179
Product: Security Response
Classification: Other
Component: vulnerability-draft
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2024-11-15 17:03 UTC by OSIDB Bzimport
Modified: 2024-11-15 17:03 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: ---
Doc Text:
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.
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Description OSIDB Bzimport 2024-11-15 17:03:15 UTC 
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/
Comment 1 Mauro Matteo Cascella 2024-11-15 17:03:26 UTC 
Upstream patch:
https://lore.kernel.org/lkml/20230813160006.1073695-11-sashal@kernel.org/
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