Bug 2155947 (CVE-2022-47938, ZDI-22-1689, ZDI-CAN-17818) - CVE-2022-47938 kernel: improper input validation in handling of SMB2_TREE_CONNECT command can result in out-of-bounds read which could result in DoS
Summary: CVE-2022-47938 kernel: improper input validation in handling of SMB2_TREE_CON...
Keywords:
Status: NEW
Alias: CVE-2022-47938, ZDI-22-1689, ZDI-CAN-17818
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Nobody
QA Contact:
URL:
Whiteboard:
Depends On: 2155953 2155994 2155995 2155996 2155997
Blocks: 2155936
TreeView+ depends on / blocked
 
Reported: 2022-12-23 02:00 UTC by Michael Kaplan
Modified: 2023-07-07 08:28 UTC (History)
37 users (show)

Fixed In Version: kernel 6.0-rc1
Doc Type: If docs needed, set a value
Doc Text:
A denial-of-service flaw was found in the Linux Kernel while handling SMB2_TREE_CONNECT commands in CIFS Filesystem. 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 vulnerability to create a denial-of-service condition in the system.
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Description Michael Kaplan 2022-12-23 02:00:25 UTC 
This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Linux Kernel. Authentication is required to exploit this vulnerability.

The specific flaw exists within the handling of SMB2_TREE_CONNECT commands. 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 vulnerability to create a denial-of-service condition on the system.

References: 

https://www.zerodayinitiative.com/advisories/ZDI-22-1689/
Comment 1 Michael Kaplan 2022-12-23 02:02:32 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2155953]
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