Bug 1202855 (CVE-2015-1805)

Summary:	CVE-2015-1805 kernel: pipe: iovec overrun leading to memory corruption
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	agordeev, aquini, bhu, carnil, dhoward, esammons, fhrbata, iboverma, jaeshin, jkacur, jross, kernel-mgr, kstutsma, lgoncalv, lwang, matt, mcressma, mguzik, nmurray, pholasek, plougher, rvrbovsk, sauchter, security-response-team, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	It was found that the Linux kernel's implementation of vectored pipe read and write functionality did not take into account the I/O vectors that were already processed when retrying after a failed atomic access operation, potentially resulting in memory corruption due to an I/O vector array overrun. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-06-23 12:19:03 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:	1185166, 1198843, 1202860, 1202861, 1202862, 1202863, 1202864, 1202865, 1203782, 1203783, 1203784, 1203787, 1203788, 1203789
Bug Blocks:	1202879

Description Petr Matousek 2015-03-17 15:01:29 UTC

A flaw was found in the way pipe_iov_copy_from_user() and
pipe_iov_copy_to_user() functions handled iovecs remaining len accounting on
failed atomic access.

An unprivileged local user could this flaw to crash the system or, potentially,
escalate their privileges on the system.

Upstream fixes:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f0d1bec9d58d4c038d0ac958c9af82be6eb18045
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=637b58c2887e5e57850865839cc75f59184b23d1

Acknowledgements:

The security impact of this issue was discovered by Red Hat.

Comment 5 Petr Matousek 2015-03-19 16:22:47 UTC

Statement:

This issue does affect the Linux kernel packages as shipped with Red Hat
Enterprise Linux 5, 6, and 7, and Red Hat Enterprise MRG 2. Future Linux
kernel updates for the respective releases will address this issue.

Comment 7 errata-xmlrpc 2015-06-02 15:54:32 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 5

Via RHSA-2015:1042 https://rhn.redhat.com/errata/RHSA-2015-1042.html

Comment 8 errata-xmlrpc 2015-06-09 14:24:54 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.2 AUS

Via RHSA-2015:1082 https://rhn.redhat.com/errata/RHSA-2015-1082.html

Comment 9 errata-xmlrpc 2015-06-09 14:49:33 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2015:1081 https://rhn.redhat.com/errata/RHSA-2015-1081.html

Comment 10 errata-xmlrpc 2015-06-16 14:59:40 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 5.9 AUS - Server Only

Via RHSA-2015:1120 https://rhn.redhat.com/errata/RHSA-2015-1120.html

Comment 11 errata-xmlrpc 2015-06-23 08:25:54 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:1139 https://rhn.redhat.com/errata/RHSA-2015-1139.html

Comment 12 errata-xmlrpc 2015-06-23 08:29:13 UTC

This issue has been addressed in the following products:

  MRG for RHEL-6 v.2

Via RHSA-2015:1138 https://rhn.redhat.com/errata/RHSA-2015-1138.html

Comment 13 errata-xmlrpc 2015-06-23 08:48:21 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:1137 https://rhn.redhat.com/errata/RHSA-2015-1137.html

Comment 15 errata-xmlrpc 2015-06-25 13:46:34 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 5.6 Long Life

Via RHSA-2015:1190 https://rhn.redhat.com/errata/RHSA-2015-1190.html

Comment 16 errata-xmlrpc 2015-06-30 13:58:58 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.5 EUS - Server and Compute Node Only

Via RHSA-2015:1199 https://rhn.redhat.com/errata/RHSA-2015-1199.html

Comment 17 errata-xmlrpc 2015-07-07 13:00:16 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.4 AUS - Server Only

Via RHSA-2015:1211 https://rhn.redhat.com/errata/RHSA-2015-1211.html