Bug 1759767 (CVE-2019-17075)

Summary:	CVE-2019-17075 kernel: denial of service in write_tpt_entry in drivers/infiniband/hw/cxgb4/mem.c
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, airlied, bdettelb, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jschorr, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, masami256, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, steved, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A denial of service (DoS) was found in the write_tpt_entry in drivers/infiniband/hw/cxgb4/mem.c in the cxgb4' Chelsio T4/T5 RDMA Driver. Some of the architectures performing the DMA operation directly from the stack variable (instead of the heap) allows an attacker in the network to cause some security threat.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-04-02 10:31:49 UTC	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:	1759768
Bug Blocks:	1759769

Description Dhananjay Arunesh 2019-10-09 04:08:14 UTC

An issue was discovered in write_tpt_entry in drivers/infiniband/hw/cxgb4/mem.c in the Linux kernel. The cxgb4 driver is directly calling dma_map_single (a DMA function) from a stack variable. This could allow an attacker to trigger a Denial of Service, exploitable if this driver is used on an architecture for which this stack/DMA interaction has security relevance.

Reference:
https://lore.kernel.org/lkml/20191001165611.GA3542072@kroah.com

Comment 1 Dhananjay Arunesh 2019-10-09 04:09:04 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1759768]

Comment 2 Justin M. Forbes 2020-03-19 16:59:07 UTC

This was fixed for Fedora with the 5.3.8 stable kernel updates.

Comment 4 Rohit Keshri 2020-04-02 07:29:46 UTC

Mitigation:

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Comment 6 Product Security DevOps Team 2020-04-02 10:31:49 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-2019-17075