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Bug 972174 - (CVE-2015-8839) VUL-1: CVE-2015-8839: kernel: ext4 data corruption due to punch hole races
(CVE-2015-8839)
VUL-1: CVE-2015-8839: kernel: ext4 data corruption due to punch hole races
Status: RESOLVED FIXED
Classification: Novell Products
Product: SUSE Security Incidents
Classification: Novell Products
Component: Incidents
unspecified
Other Other
: P1 - Urgent : Major
: ---
Assigned To: Security Team bot
Security Team bot
CVSSv2:SUSE:CVE-2015-8839:2.4:(AV:L/...
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Blocks:
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Reported: 2016-03-22 15:28 UTC by Jan Kara
Modified: 2020-06-10 07:57 UTC (History)
3 users (show)

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Found By: ---
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Description Jan Kara 2016-03-22 15:28:44 UTC 
When punching holes into a file races with the page fault of the same area, it is possible that freed blocks remain referenced from page cache pages mapped to process' address space. Thus modification of these blocks can corrupt data someone else is now storing in those blocks (which obviously has security implications if you can trick filesystem into storing some important file in those blocks).

This affects all the kernels where we support ext4 for writing. Relevant fixes upstream are commits ea3d7209ca01da209cda6f0dea8be9cc4b7a933b, 17048e8a083fec7ad841d88ef0812707fbc7e39f, 32ebffd3bbb4162da5ff88f9a35dd32d0a28ea70, 011278485ecc3cd2a3954b5d4c73101d919bf1fa.
Comment 1 Jan Kara 2016-03-22 15:41:03 UTC 
For record I've pushed the fixes to SLE12 SP2 kernel branch where it is trivial. I'll take a look at backporting it further later.
Comment 2 Jan Kara 2016-03-24 10:24:49 UTC 
OK, I have prepared fixes for SLE12 and SLE12-SP1 branches and pushed them out.
Comment 3 Marcus Meissner 2016-03-30 15:59:46 UTC 
was this reported to security@kernel.org or other media?

might need a CVE id
Comment 4 Jan Kara 2016-03-31 09:01:22 UTC 
Well, it went through filesystem mailing lists but nothing security related AFAIK.
Comment 5 Jan Kara 2016-03-31 10:41:00 UTC 
I have pushed out fixes for openSUSE Leap 42.1 and openSUSE 13.2 kernels. So all the backports I have planned should be done.
Comment 6 Johannes Segitz 2016-03-31 15:11:44 UTC 
(In reply to Jan Kara from comment #4)
I requested CVE(s)
Comment 7 Johannes Segitz 2016-04-04 07:30:54 UTC 
CVE got assigned: CVE-2015-8839

Thread & discussion: http://seclists.org/oss-sec/2016/q2/1
Comment 8 Swamp Workflow Management 2016-05-23 14:10:52 UTC 
openSUSE-SU-2016:1382-1: An update that solves 11 vulnerabilities and has four fixes is now available.

Category: security (important)
Bug References: 957988,970892,970911,970948,970955,970956,970958,970970,971124,971360,971628,972174,973378,974418,975868
CVE References: CVE-2016-2185,CVE-2016-2186,CVE-2016-2188,CVE-2016-2847,CVE-2016-3136,CVE-2016-3137,CVE-2016-3138,CVE-2016-3140,CVE-2016-3156,CVE-2016-3689,CVE-2016-3951
Sources used:
openSUSE Leap 42.1 (src):    kernel-debug-4.1.21-14.2, kernel-default-4.1.21-14.2, kernel-docs-4.1.21-14.5, kernel-ec2-4.1.21-14.2, kernel-obs-build-4.1.21-14.4, kernel-obs-qa-4.1.21-14.2, kernel-obs-qa-xen-4.1.21-14.2, kernel-pae-4.1.21-14.2, kernel-pv-4.1.21-14.2, kernel-source-4.1.21-14.2, kernel-syms-4.1.21-14.2, kernel-vanilla-4.1.21-14.2, kernel-xen-4.1.21-14.2
Comment 9 Swamp Workflow Management 2016-06-27 17:22:16 UTC 
SUSE-SU-2016:1690-1: An update that solves 29 vulnerabilities and has 89 fixes is now available.

Category: security (important)
Bug References: 676471,880007,889207,899908,903279,928547,931448,940413,943989,944309,945345,947337,953233,954847,956491,956852,957805,957986,960857,962336,962846,962872,963193,963572,963762,964461,964727,965319,966054,966245,966573,966831,967251,967292,967299,967903,968010,968141,968448,968512,968667,968670,968687,968812,968813,969439,969571,969655,969690,969735,969992,969993,970062,970114,970504,970506,970604,970892,970909,970911,970948,970955,970956,970958,970970,971049,971124,971125,971126,971159,971170,971360,971600,971628,971947,972003,972174,972844,972891,972933,972951,973378,973556,973570,973855,974165,974308,974406,974418,974646,975371,975488,975533,975945,976739,976868,977582,977685,978401,978822,979169,979213,979419,979485,979548,979867,979879,980348,980371,981143,981344,982354,982698,983213,983318,983394,983904,984456
CVE References: CVE-2014-9717,CVE-2015-8816,CVE-2015-8845,CVE-2016-0758,CVE-2016-2053,CVE-2016-2143,CVE-2016-2184,CVE-2016-2185,CVE-2016-2186,CVE-2016-2188,CVE-2016-2782,CVE-2016-2847,CVE-2016-3134,CVE-2016-3136,CVE-2016-3137,CVE-2016-3138,CVE-2016-3139,CVE-2016-3140,CVE-2016-3156,CVE-2016-3672,CVE-2016-3689,CVE-2016-3951,CVE-2016-4482,CVE-2016-4486,CVE-2016-4565,CVE-2016-4569,CVE-2016-4578,CVE-2016-4805,CVE-2016-5244
Sources used:
SUSE Linux Enterprise Workstation Extension 12 (src):    kernel-default-3.12.60-52.49.1
SUSE Linux Enterprise Software Development Kit 12 (src):    kernel-docs-3.12.60-52.49.3, kernel-obs-build-3.12.60-52.49.1
SUSE Linux Enterprise Server 12 (src):    kernel-default-3.12.60-52.49.1, kernel-source-3.12.60-52.49.1, kernel-syms-3.12.60-52.49.1, kernel-xen-3.12.60-52.49.1
SUSE Linux Enterprise Module for Public Cloud 12 (src):    kernel-ec2-3.12.60-52.49.1
SUSE Linux Enterprise Live Patching 12 (src):    kgraft-patch-SLE12_Update_14-1-2.1
SUSE Linux Enterprise Desktop 12 (src):    kernel-default-3.12.60-52.49.1, kernel-source-3.12.60-52.49.1, kernel-syms-3.12.60-52.49.1, kernel-xen-3.12.60-52.49.1
Comment 10 Swamp Workflow Management 2016-06-28 14:21:20 UTC 
SUSE-SU-2016:1696-1: An update that solves 16 vulnerabilities and has 66 fixes is now available.

Category: security (important)
Bug References: 662458,676471,889207,897662,899908,903279,908151,928547,931448,937086,940413,942262,943989,944309,945345,951844,953233,957805,958390,959514,960857,962336,962846,962872,963572,964461,964727,965319,966054,966573,967640,968497,968687,968812,968813,969016,970604,970609,970892,970911,970948,970955,970956,970958,970970,971049,971124,971126,971159,971170,971600,971628,971793,971947,972003,972068,972174,972780,972844,972891,972951,973378,973556,973855,974418,974646,974692,975371,975488,975772,975945,976739,976821,976868,977582,977685,978401,978527,978822,979213,979347,983143
CVE References: CVE-2014-9717,CVE-2016-1583,CVE-2016-2185,CVE-2016-2186,CVE-2016-2188,CVE-2016-2847,CVE-2016-3134,CVE-2016-3136,CVE-2016-3137,CVE-2016-3138,CVE-2016-3140,CVE-2016-3689,CVE-2016-3951,CVE-2016-4482,CVE-2016-4486,CVE-2016-4569
Sources used:
SUSE Linux Enterprise Workstation Extension 12-SP1 (src):    kernel-default-3.12.59-60.41.2
SUSE Linux Enterprise Software Development Kit 12-SP1 (src):    kernel-docs-3.12.59-60.41.8, kernel-obs-build-3.12.59-60.41.2
SUSE Linux Enterprise Server 12-SP1 (src):    kernel-default-3.12.59-60.41.2, kernel-source-3.12.59-60.41.2, kernel-syms-3.12.59-60.41.1, kernel-xen-3.12.59-60.41.2
SUSE Linux Enterprise Module for Public Cloud 12 (src):    kernel-ec2-3.12.59-60.41.2
SUSE Linux Enterprise Live Patching 12 (src):    kgraft-patch-SLE12-SP1_Update_5-1-2.1
SUSE Linux Enterprise Desktop 12-SP1 (src):    kernel-default-3.12.59-60.41.2, kernel-source-3.12.59-60.41.2, kernel-syms-3.12.59-60.41.1, kernel-xen-3.12.59-60.41.2
Comment 11 Swamp Workflow Management 2016-07-08 15:26:41 UTC 
SUSE-SU-2016:1764-1: An update that solves 26 vulnerabilities and has 95 fixes is now available.

Category: security (important)
Bug References: 880007,889207,899908,903279,908151,931448,937086,940413,942262,943645,943989,945219,956084,956852,957986,957988,957990,959146,959514,959709,960174,960561,960629,961500,961512,961658,962336,962872,963193,963572,963746,963765,963827,963960,964201,964461,965087,965153,965199,965319,965830,965924,966054,966094,966437,966471,966573,966693,966831,966864,966910,967047,967251,967292,967299,967650,967651,967802,967903,968010,968018,968074,968141,968206,968230,968234,968253,968448,968497,968512,968643,968670,968687,968812,968813,969112,969439,969571,969655,969690,969735,969992,969993,970062,970160,970504,970604,970609,970892,970909,970911,970948,970955,970956,970958,970970,971124,971125,971126,971159,971170,971360,971600,971628,972003,972068,972174,972780,972844,972891,972951,973378,973556,973855,974406,974418,975371,975488,975772,975945,980246
CVE References: CVE-2015-7566,CVE-2015-8550,CVE-2015-8551,CVE-2015-8552,CVE-2015-8709,CVE-2015-8785,CVE-2015-8812,CVE-2015-8816,CVE-2016-0723,CVE-2016-2143,CVE-2016-2184,CVE-2016-2185,CVE-2016-2186,CVE-2016-2188,CVE-2016-2384,CVE-2016-2782,CVE-2016-3134,CVE-2016-3136,CVE-2016-3137,CVE-2016-3138,CVE-2016-3139,CVE-2016-3140,CVE-2016-3156,CVE-2016-3689,CVE-2016-3707,CVE-2016-3951
Sources used:
SUSE Linux Enterprise Real Time Extension 12-SP1 (src):    kernel-compute-3.12.58-14.1, kernel-compute_debug-3.12.58-14.1, kernel-rt-3.12.58-14.1, kernel-rt_debug-3.12.58-14.1, kernel-source-rt-3.12.58-14.1, kernel-syms-rt-3.12.58-14.1
Comment 12 Swamp Workflow Management 2016-08-24 13:16:41 UTC 
openSUSE-SU-2016:2144-1: An update that solves 53 vulnerabilities and has 28 fixes is now available.

Category: security (important)
Bug References: 901754,941113,942702,945219,955654,957052,957988,959709,960561,961512,963762,963765,966245,966437,966693,966849,967972,967973,967974,967975,968010,968011,968012,968013,968018,968670,969354,969355,970114,970275,970892,970909,970911,970948,970955,970956,970958,970970,971124,971125,971126,971360,971628,971799,971919,971944,972174,973378,973570,974308,974418,974646,975945,978401,978445,978469,978821,978822,979021,979213,979548,979867,979879,979913,980348,980363,980371,980725,981267,982706,983143,983213,984464,984755,984764,986362,986365,986377,986572,986573,986811
CVE References: CVE-2012-6701,CVE-2013-7446,CVE-2014-9904,CVE-2015-3288,CVE-2015-6526,CVE-2015-7566,CVE-2015-8709,CVE-2015-8785,CVE-2015-8812,CVE-2015-8816,CVE-2015-8830,CVE-2016-0758,CVE-2016-1583,CVE-2016-2053,CVE-2016-2184,CVE-2016-2185,CVE-2016-2186,CVE-2016-2187,CVE-2016-2188,CVE-2016-2384,CVE-2016-2543,CVE-2016-2544,CVE-2016-2545,CVE-2016-2546,CVE-2016-2547,CVE-2016-2548,CVE-2016-2549,CVE-2016-2782,CVE-2016-2847,CVE-2016-3134,CVE-2016-3136,CVE-2016-3137,CVE-2016-3138,CVE-2016-3139,CVE-2016-3140,CVE-2016-3156,CVE-2016-3672,CVE-2016-3689,CVE-2016-3951,CVE-2016-4470,CVE-2016-4482,CVE-2016-4485,CVE-2016-4486,CVE-2016-4565,CVE-2016-4569,CVE-2016-4578,CVE-2016-4580,CVE-2016-4581,CVE-2016-4805,CVE-2016-4913,CVE-2016-4997,CVE-2016-5244,CVE-2016-5829
Sources used:
openSUSE 13.2 (src):    bbswitch-0.8-3.20.3, cloop-2.639-14.20.3, crash-7.0.8-20.3, hdjmod-1.28-18.21.3, ipset-6.23-20.3, kernel-debug-3.16.7-42.1, kernel-default-3.16.7-42.1, kernel-desktop-3.16.7-42.1, kernel-docs-3.16.7-42.2, kernel-ec2-3.16.7-42.1, kernel-obs-build-3.16.7-42.2, kernel-obs-qa-3.16.7-42.1, kernel-obs-qa-xen-3.16.7-42.1, kernel-pae-3.16.7-42.1, kernel-source-3.16.7-42.1, kernel-syms-3.16.7-42.1, kernel-vanilla-3.16.7-42.1, kernel-xen-3.16.7-42.1, pcfclock-0.44-260.20.2, vhba-kmp-20140629-2.20.2, virtualbox-5.0.20-48.5, xen-4.4.4_02-46.2, xtables-addons-2.6-22.3
Comment 13 Marcus Meissner 2017-03-01 13:11:19 UTC 
released
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