Bug 1211529 (CVE-2023-32247) - VUL-0: CVE-2023-32247: kernel: Linux Kernel ksmbd Session Setup Memory Exhaustion Denial-of-Service Vulnerability
Summary: VUL-0: CVE-2023-32247: kernel: Linux Kernel ksmbd Session Setup Memory Exhaus...
Status: RESOLVED UPSTREAM
Alias: CVE-2023-32247
Product: openSUSE Tumbleweed
Classification: openSUSE
Component: Kernel (show other bugs)
Version: Current
Hardware: Other Other
: P3 - Medium : Major (vote)
Target Milestone: ---
Assignee: Security Team bot
QA Contact: E-mail List
URL: https://smash.suse.de/issue/366975/
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Reported: 2023-05-19 07:32 UTC by Stoyan Manolov
Modified: 2023-05-25 06:27 UTC (History)
3 users (show)

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Found By: Security Response Team
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Blocker: ---
Marketing QA Status: ---
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Description Stoyan Manolov 2023-05-19 07:32:31 UTC 
CVE-2023-32247

This vulnerability allows remote attackers to create a denial-of-service
condition 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 handling of SMB2_SESSION_SETUP commands. The
issue results from the lack of control of resource consumption. An attacker can
leverage this vulnerability to create a denial-of-service condition on the
system.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-32247
https://www.zerodayinitiative.com/advisories/ZDI-23-695/
Comment 2 Michal Koutný 2023-05-22 16:18:16 UTC 
Reassigning to a concrete person to ensure progress [1] (feel free to pass to next one), see also the process at [2].
 
The report translates to
https://github.com/torvalds/linux/commit/ea174a91893956450510945a0c5d1a10b5323656

Possibly needed in the `stable` branch before v6.4 is out.
 
[1] https://confluence.suse.com/display/KSS/Kernel+Security+Sentinel
[2] https://wiki.suse.net/index.php/SUSE-Labs/Kernel/Security