Bug 2155947 (CVE-2022-47938, ZDI-22-1689, ZDI-CAN-17818)

Summary:	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
Product:	[Other] Security Response	Reporter:	Michael Kaplan <mkaplan>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, bhu, cchiang, chwhite, crwood, ddepaula, debarbos, dfreiber, dvlasenk, ezulian, hkrzesin, jarod, jburrell, jfaracco, jferlan, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, kernel-mgr, lgoncalv, lzampier, nmurray, ptalbert, qzhao, rogbas, rvrbovsk, saroy, scweaver, vkumar, walters, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
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.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2155953, 2155994, 2155995, 2155996, 2155997
Bug Blocks:	2155936

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]