Bug 1445338 (CVE-2017-8065)

Summary:	CVE-2017-8065 kernel: crypto/ccm.c interacts incorrectly with the CONFIG_VMAP_STACK option
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aquini, bhu, dhoward, fhrbata, gansalmon, hwkernel-mgr, iboverma, ichavero, itamar, jforbes, jkacur, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, madhu.chinakonda, matt, mchehab, mcressma, nmurray, pholasek, plougher, rt-maint, rvrbovsk, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:11:22 UTC	Type:	---
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Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1445344
Bug Blocks:

Description Adam Mariš 2017-04-25 13:47:38 UTC

crypto/ccm.c in the Linux kernel 4.9.x and 4.10.x through 4.10.12
interacts incorrectly with the CONFIG_VMAP_STACK option, which allows
local users to cause a denial of service (system crash or memory
corruption) or possibly have unspecified other impact by leveraging
use of more than one virtual page for a DMA scatterlist.

Upstream patch:

https://github.com/torvalds/linux/commit/3b30460c5b0ed762be75a004e924ec3f8711e032

Comment 1 Adam Mariš 2017-04-25 13:54:39 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1445344]

Comment 2 Justin M. Forbes 2017-04-27 14:06:24 UTC

The commit that this patch fixes was not until 4.11-rc1, 4.9 and 4.10 both have idata/odata as part of pctx.  This bug never shipped in a released kernel, it was introduced in the 4.11 merge window and resolved in the merge window.