Bug 1211532 (CVE-2023-32250)

Summary: VUL-0: CVE-2023-32250: kernel: Linux Kernel ksmbd Session Race Condition Remote Code Execution Vulnerability
Product: [openSUSE] openSUSE Tumbleweed Reporter: Stoyan Manolov <stoyan.manolov>
Component: KernelAssignee: Security Team bot <security-team>
Status: RESOLVED UPSTREAM QA Contact: E-mail List <qa-bugs>
Severity: Major    
Priority: P3 - Medium CC: ddiss, meissner, mkoutny, security-team
Version: Current   
Target Milestone: ---   
Hardware: Other   
OS: Other   
URL: https://smash.suse.de/issue/366972/
Whiteboard:
Found By: Security Response Team Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---

Description Stoyan Manolov 2023-05-19 07:34:22 UTC 
CVE-2023-32250

This vulnerability 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.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-32250
https://www.zerodayinitiative.com/advisories/ZDI-23-698/
Comment 2 Michal Koutný 2023-05-22 16:29:56 UTC 
https://github.com/torvalds/linux/commit/f5c779b7ddbda30866cf2a27c63e34158f858c73

Possibly needed in the `stable` branch before v6.4 is out.