Bug 1454757 (CVE-2017-9211)

Summary:	CVE-2017-9211 kernel: Null pointer dereference due to missing key-size check in setkey function
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	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, lgoncalv, madhu.chinakonda, mchehab, mcressma, nmurray, pholasek, ptalbert, rvrbovsk, slawomir, williams, wmealing
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	The crypto_skcipher_init_tfm function in crypto/skcipher.c in the Linux kernel through 4.11.2 relies on a setkey function that lacks a key-size check, which allows local users to cause a denial of service (NULL pointer dereference) via a crafted application.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-27 10:52:39 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:	1454759, 1458154, 1458155, 1458156
Bug Blocks:	1454767

Description Adam Mariš 2017-05-23 12:37:51 UTC

The crypto_skcipher_init_tfm function in crypto/skcipher.c in the Linux kernel through 4.11.2 relies on a setkey function that lacks a key-size check, which allows local users to cause a denial of service (NULL pointer dereference) via a crafted application.

Upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/crypto?id=9933e113c2e87a9f46a40fde8dafbf801dca1ab9

Comment 1 Adam Mariš 2017-05-23 12:38:54 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1454759]

Comment 5 Justin M. Forbes 2018-01-29 17:29:19 UTC

This was fixed for fedora with the 4.11.4 stable updates.