Bug 1631027 (CVE-2018-9518)

Summary:	CVE-2018-9518 kernel: NFC: llcp: Out of bounds write in nfc_llcp_sdp_tlv struct in nfc/llcp_commands.c
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abhgupta, acaringi, airlied, aquini, bhu, blc, brdeoliv, bskeggs, dbaker, dhoward, dvlasenk, esammons, ewk, fhrbata, hdegoede, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jarodwilson, jforbes, jglisse, jkacur, john.j5live, jokerman, jonathan, josef, jross, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, security-response-team, steved, sthangav, trankin, vdronov, 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 flaw was found in the Linux kernel in nfc_llcp_build_sdreq_tlv() in net/nfc/llcp_commands.c that lack of size check may lead to an out of bounds write.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-09-26 13:30:44 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:	1631030, 1631031, 1631032
Bug Blocks:	1631028

Description Pedro Sampaio 2018-09-19 19:19:21 UTC

A flaw was found in the Linux kernel in nfc_llcp_build_sdreq_tlv() in net/nfc/llcp_commands.c that lack of size check may lead to an out of bounds write.

Introduced by:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d9b8d8e19b073096d3609bbd60f82148d128b555

Upstream patch:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fe9c842695e26d8116b61b80bfb905356f07834b

Comment 1 Pedro Sampaio 2018-09-19 19:21:10 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1631030]

Comment 3 Justin M. Forbes 2018-09-20 12:11:19 UTC

This was fixed for Fedora with the 4.16 rebases

Comment 6 Vladis Dronov 2018-09-26 13:30:44 UTC

Note:

No Red Hat products are vulnerable to this flaw.