Bug 2208849 (CVE-2023-32250, ZDI-23-698, ZDI-CAN-20481) - CVE-2023-32250 kernel: ksmbd: session race condition remote code execution vulnerability
Summary: CVE-2023-32250 kernel: ksmbd: session race condition remote code execution vu...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2023-32250, ZDI-23-698, ZDI-CAN-20481
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 2190273
TreeView+ depends on / blocked
 
Reported: 2023-05-21 14:46 UTC by Rohit Keshri
Modified: 2023-05-22 08:25 UTC (History)
40 users (show)

Fixed In Version: kernel 6.4-rc1
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the Linux kernel's ksmbd, a high-performance in-kernel SMB server. The specific flaw exists within the processing of SMB2_SESSION_SETUP commands. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to execute code in the context of the kernel.
Clone Of:
Environment:
Last Closed: 2023-05-21 19:41:26 UTC
Embargoed:

Attachments (Terms of Use)

Description Rohit Keshri 2023-05-21 14:46:04 UTC 
A vulnerability was found in fs/ksmbd/connection.c in ksmbd in the Linux Kernel. This flaw allows remote attackers to execute arbitrary code on affected installations of Linux Kernel. Authentication is not required to exploit this vulnerability, but only systems with ksmbd enabled are vulnerable.

The specific flaw exists within the processing of SMB2_SESSION_SETUP commands. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to execute code in the context of the kernel.

Reference:
https://github.com/torvalds/linux/commit/f5c779b7ddbda30866cf2a27c63e34158f858c73
https://www.zerodayinitiative.com/advisories/ZDI-23-698/
Comment 1 Rohit Keshri 2023-05-21 14:58:27 UTC 
There was no shipped kernel version were seen affected with this problem. These files are not built in our source code.
Comment 4 Product Security DevOps Team 2023-05-21 19:41:23 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2023-32250
Note You need to log in before you can comment on or make changes to this bug.