Bug 945825 (CVE-2015-6937) - VUL-1: CVE-2015-6937: kernel-source: NULL pointer dereference in net/rds/connection.c
Summary: VUL-1: CVE-2015-6937: kernel-source: NULL pointer dereference in net/rds/con...
Status: RESOLVED FIXED
Alias: CVE-2015-6937
Product: SUSE Security Incidents
Classification: Novell Products
Component: Incidents (show other bugs)
Version: unspecified
Hardware: Other Other
: P4 - Low : Minor
Target Milestone: ---
Assignee: Security Team bot
QA Contact: Security Team bot
URL: https://smash.suse.de/issue/156567/
Whiteboard: CVSSv2:SUSE:CVE-2015-6937:1.9:(AV:L/A...
Keywords:
Depends on: CVE-2015-7990 953052
Blocks:
  Show dependency tree / graph
 
Reported: 2015-09-15 07:58 UTC by Victor Pereira
Modified: 2020-04-01 22:15 UTC (History)
10 users (show)

See Also:
Found By: Security Response Team
Services Priority:
Business Priority:
Blocker: ---
Marketing QA Status: ---
IT Deployment: ---

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Description Victor Pereira 2015-09-15 07:58:56 UTC 
CVE-2015-6937


CVE-2015-6937 has been assigned to this issue that is exploitable "on
sockets that weren't properly bound before attempting to send a
message"


References:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=74e98eb085889b0d2d4908f59f6e00026063014f
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-6937
http://seclists.org/oss-sec/2015/q3/545
http://people.canonical.com/~ubuntu-security/cve/2015/CVE-2015-6937.html
Comment 1 Swamp Workflow Management 2015-09-15 22:00:16 UTC 
bugbot adjusting priority
Comment 10 Jiri Bohac 2015-09-25 14:27:28 UTC 
I believe it's not remotely exploitable:

__rds_conn_create() is only called from rds_conn_create() and rds_conn_create_outgoing(). 

rds_conn_create() is always called with a static non-null trans parameter.

rds_conn_create_outgoing() is only called from rds_sendmsg(), i.e. local syscall, where trans is taken from the rs_transport field in the RDS socket.
rs_transport is initialized in rds_bind(), so it's initialized prior to handling incoming packets.

So the only way to trigger this seems to be via rds_sendmsg() on an unbound socket - i.e. a local action.
Comment 11 Marcus Meissner 2015-09-25 15:25:17 UTC 
Thanks!
Comment 12 Johannes Segitz 2015-10-27 09:03:40 UTC 
From: Quentin Casasnovas

> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=74e98eb085889b0d2d4908f59f6e00026063014f

The above fix is incomplete and still allows to trigger a NULL pointer
dereference when sending a message.  The root cause of this problem is a
race condition when checking that the socket is bound in rds_sendmsg(),
more information and a complete fix can be found here:

  https://lkml.org/lkml/2015/10/16/530

It should hit Linus' tree soon but since distributions already started
shipping the incomplete fix, I thought it would be wise to mention this
here.
Comment 13 Jiri Bohac 2015-11-05 15:10:54 UTC 
I pushed the proper fix from bsc#952384 to: SLE12, cve/linux-3.0, openSUSE-13.1, openSUSE-13.2 and openSUSE-42.1

All of them also peroperly mention this CVE in their changelogs now.
Comment 14 Swamp Workflow Management 2015-11-26 12:20:46 UTC 
SUSE-SU-2015:2108-1: An update that solves 8 vulnerabilities and has 51 fixes is now available.

Category: security (important)
Bug References: 777565,814440,900610,904348,904965,920016,923002,926007,926709,926774,930145,930788,932350,932805,933721,935053,935757,936118,938706,939826,939926,939955,940017,940925,941202,942204,942305,942367,942605,942688,942938,943786,944296,944831,944837,944989,944993,945691,945825,945827,946078,946309,947957,948330,948347,948521,949100,949298,949502,949706,949744,949981,951440,952084,952384,952579,953527,953980,954404
CVE References: CVE-2015-0272,CVE-2015-5157,CVE-2015-5307,CVE-2015-6252,CVE-2015-6937,CVE-2015-7872,CVE-2015-7990,CVE-2015-8104
Sources used:
SUSE Linux Enterprise Software Development Kit 11-SP3 (src):    kernel-docs-3.0.101-0.47.71.3
SUSE Linux Enterprise Server for VMWare 11-SP3 (src):    kernel-bigsmp-3.0.101-0.47.71.1, kernel-default-3.0.101-0.47.71.1, kernel-pae-3.0.101-0.47.71.1, kernel-source-3.0.101-0.47.71.1, kernel-syms-3.0.101-0.47.71.1, kernel-trace-3.0.101-0.47.71.1, kernel-xen-3.0.101-0.47.71.1
SUSE Linux Enterprise Server 11-SP3 (src):    kernel-bigsmp-3.0.101-0.47.71.1, kernel-default-3.0.101-0.47.71.1, kernel-ec2-3.0.101-0.47.71.1, kernel-pae-3.0.101-0.47.71.1, kernel-ppc64-3.0.101-0.47.71.1, kernel-source-3.0.101-0.47.71.1, kernel-syms-3.0.101-0.47.71.1, kernel-trace-3.0.101-0.47.71.1, kernel-xen-3.0.101-0.47.71.1
SUSE Linux Enterprise Server 11-EXTRA (src):    kernel-bigsmp-3.0.101-0.47.71.1, kernel-default-3.0.101-0.47.71.1, kernel-pae-3.0.101-0.47.71.1, kernel-ppc64-3.0.101-0.47.71.1, kernel-trace-3.0.101-0.47.71.1, kernel-xen-3.0.101-0.47.71.1
SUSE Linux Enterprise Desktop 11-SP3 (src):    kernel-bigsmp-3.0.101-0.47.71.1, kernel-default-3.0.101-0.47.71.1, kernel-pae-3.0.101-0.47.71.1, kernel-source-3.0.101-0.47.71.1, kernel-syms-3.0.101-0.47.71.1, kernel-trace-3.0.101-0.47.71.1, kernel-xen-3.0.101-0.47.71.1
SUSE Linux Enterprise Debuginfo 11-SP3 (src):    kernel-bigsmp-3.0.101-0.47.71.1, kernel-default-3.0.101-0.47.71.1, kernel-ec2-3.0.101-0.47.71.1, kernel-pae-3.0.101-0.47.71.1, kernel-ppc64-3.0.101-0.47.71.1, kernel-trace-3.0.101-0.47.71.1, kernel-xen-3.0.101-0.47.71.1
Comment 15 Swamp Workflow Management 2015-12-08 20:11:12 UTC 
openSUSE-SU-2015:2232-1: An update that solves 5 vulnerabilities and has 16 fixes is now available.

Category: security (moderate)
Bug References: 883192,944978,945825,948758,949936,951533,952384,952579,952976,953527,953559,953717,954404,954421,954647,954757,954876,955190,955363,955365,956856
CVE References: CVE-2015-5307,CVE-2015-6937,CVE-2015-7799,CVE-2015-7990,CVE-2015-8104
Sources used:
openSUSE Leap 42.1 (src):    kernel-debug-4.1.13-5.1, kernel-default-4.1.13-5.1, kernel-docs-4.1.13-5.4, kernel-ec2-4.1.13-5.1, kernel-obs-build-4.1.13-5.2, kernel-obs-qa-4.1.13-5.1, kernel-obs-qa-xen-4.1.13-5.1, kernel-pae-4.1.13-5.1, kernel-pv-4.1.13-5.1, kernel-source-4.1.13-5.1, kernel-syms-4.1.13-5.1, kernel-vanilla-4.1.13-5.1, kernel-xen-4.1.13-5.1
Comment 16 Swamp Workflow Management 2015-12-22 15:20:23 UTC 
SUSE-SU-2015:2339-1: An update that solves 10 vulnerabilities and has 57 fixes is now available.

Category: security (important)
Bug References: 814440,879378,879381,900610,904348,904965,921081,926774,930145,930770,930788,930835,932805,935123,935757,937256,937444,938706,939826,939926,939955,940017,940913,940946,941202,942938,943786,944296,944677,944831,944837,944989,944993,945691,945825,945827,946078,946214,946309,947957,948330,948347,948521,949100,949298,949502,949706,949744,949936,949981,950298,950750,950998,951440,952084,952384,952579,952976,953527,953799,953980,954404,954628,954950,954984,955673,956709
CVE References: CVE-2015-0272,CVE-2015-5157,CVE-2015-5307,CVE-2015-6937,CVE-2015-7509,CVE-2015-7799,CVE-2015-7872,CVE-2015-7990,CVE-2015-8104,CVE-2015-8215
Sources used:
SUSE Linux Enterprise Software Development Kit 11-SP4 (src):    kernel-docs-3.0.101-68.2
SUSE Linux Enterprise Server 11-SP4 (src):    kernel-default-3.0.101-68.1, kernel-ec2-3.0.101-68.1, kernel-pae-3.0.101-68.1, kernel-ppc64-3.0.101-68.1, kernel-source-3.0.101-68.1, kernel-syms-3.0.101-68.1, kernel-trace-3.0.101-68.1, kernel-xen-3.0.101-68.1
SUSE Linux Enterprise Server 11-EXTRA (src):    kernel-default-3.0.101-68.1, kernel-pae-3.0.101-68.1, kernel-ppc64-3.0.101-68.1, kernel-trace-3.0.101-68.1, kernel-xen-3.0.101-68.1
SUSE Linux Enterprise Desktop 11-SP4 (src):    kernel-default-3.0.101-68.1, kernel-pae-3.0.101-68.1, kernel-source-3.0.101-68.1, kernel-syms-3.0.101-68.1, kernel-trace-3.0.101-68.1, kernel-xen-3.0.101-68.1
SUSE Linux Enterprise Debuginfo 11-SP4 (src):    kernel-default-3.0.101-68.1, kernel-ec2-3.0.101-68.1, kernel-pae-3.0.101-68.1, kernel-ppc64-3.0.101-68.1, kernel-trace-3.0.101-68.1, kernel-xen-3.0.101-68.1
Comment 17 Swamp Workflow Management 2015-12-23 17:22:01 UTC 
SUSE-SU-2015:2350-1: An update that solves 10 vulnerabilities and has 62 fixes is now available.

Category: security (important)
Bug References: 814440,879378,879381,900610,904348,904965,921081,926709,926774,930145,930770,930788,930835,932805,935053,935123,935757,937256,937444,937969,937970,938706,939207,939826,939926,939955,940017,940913,940946,941202,942938,943786,944677,944831,944837,944989,944993,945691,945825,945827,946078,946214,946309,947957,948330,948347,948521,949100,949298,949502,949706,949744,949936,949981,950298,950750,950998,951440,952084,952384,952579,952976,953527,953799,953980,954404,954628,954950,954984,955354,955673,956709
CVE References: CVE-2015-0272,CVE-2015-5157,CVE-2015-5307,CVE-2015-6937,CVE-2015-7509,CVE-2015-7799,CVE-2015-7872,CVE-2015-7990,CVE-2015-8104,CVE-2015-8215
Sources used:
SUSE Linux Enterprise Real Time Extension 11-SP4 (src):    kernel-rt-3.0.101.rt130-48.1, kernel-rt_trace-3.0.101.rt130-48.1, kernel-source-rt-3.0.101.rt130-48.1, kernel-syms-rt-3.0.101.rt130-48.1
SUSE Linux Enterprise Debuginfo 11-SP4 (src):    kernel-rt-3.0.101.rt130-48.1, kernel-rt_debug-3.0.101.rt130-48.1, kernel-rt_trace-3.0.101.rt130-48.1
Comment 18 Swamp Workflow Management 2016-02-01 15:22:15 UTC 
openSUSE-SU-2016:0301-1: An update that solves 57 vulnerabilities and has 21 fixes is now available.

Category: security (important)
Bug References: 814440,851610,869564,873385,906545,907818,909077,909477,911326,912202,915517,915577,917830,918333,919007,919018,919463,919596,921313,921949,922583,922936,922944,926238,926240,927780,927786,928130,929525,930399,931988,932348,933896,933904,933907,933934,935542,935705,936502,936831,937032,937033,937969,938706,940338,944296,945825,947155,949936,950998,951194,951440,951627,952384,952579,952976,953052,953527,954138,954404,955224,955354,955422,956708,956934,957988,957990,958504,958510,958886,958951,959190,959399,959568,960839,961509,961739,962075
CVE References: CVE-2014-2568,CVE-2014-8133,CVE-2014-8989,CVE-2014-9090,CVE-2014-9419,CVE-2014-9529,CVE-2014-9683,CVE-2014-9715,CVE-2014-9728,CVE-2014-9729,CVE-2014-9730,CVE-2014-9731,CVE-2015-0272,CVE-2015-0777,CVE-2015-1420,CVE-2015-1421,CVE-2015-2041,CVE-2015-2042,CVE-2015-2150,CVE-2015-2666,CVE-2015-2830,CVE-2015-2922,CVE-2015-2925,CVE-2015-3212,CVE-2015-3339,CVE-2015-3636,CVE-2015-4001,CVE-2015-4002,CVE-2015-4003,CVE-2015-4004,CVE-2015-4036,CVE-2015-4167,CVE-2015-4692,CVE-2015-4700,CVE-2015-5157,CVE-2015-5283,CVE-2015-5307,CVE-2015-5364,CVE-2015-5366,CVE-2015-5707,CVE-2015-6937,CVE-2015-7550,CVE-2015-7799,CVE-2015-7833,CVE-2015-7872,CVE-2015-7885,CVE-2015-7990,CVE-2015-8104,CVE-2015-8215,CVE-2015-8543,CVE-2015-8550,CVE-2015-8551,CVE-2015-8552,CVE-2015-8569,CVE-2015-8575,CVE-2015-8767,CVE-2016-0728
Sources used:
openSUSE 13.1 (src):    cloop-2.639-11.22.2, crash-7.0.2-2.22.2, hdjmod-1.28-16.22.2, ipset-6.21.1-2.26.2, iscsitarget-1.4.20.3-13.22.2, kernel-debug-3.11.10-32.1, kernel-default-3.11.10-32.1, kernel-desktop-3.11.10-32.1, kernel-docs-3.11.10-32.3, kernel-ec2-3.11.10-32.1, kernel-pae-3.11.10-32.1, kernel-source-3.11.10-32.1, kernel-syms-3.11.10-32.1, kernel-trace-3.11.10-32.1, kernel-vanilla-3.11.10-32.1, kernel-xen-3.11.10-32.1, ndiswrapper-1.58-22.1, pcfclock-0.44-258.22.1, vhba-kmp-20130607-2.23.1, virtualbox-4.2.36-2.55.1, xen-4.3.4_10-56.1, xtables-addons-2.3-2.22.1
Comment 22 Swamp Workflow Management 2016-02-03 14:14:03 UTC 
openSUSE-SU-2016:0318-1: An update that solves 19 vulnerabilities and has 18 fixes is now available.

Category: security (important)
Bug References: 814440,906545,912202,921949,937969,937970,938706,944296,945825,949936,950998,951627,951638,952384,952579,952976,953527,954138,954404,955224,955354,955422,956708,956934,957988,957990,958504,958510,958886,958951,959190,959399,959568,960839,961509,961739,962075
CVE References: CVE-2014-8989,CVE-2014-9529,CVE-2015-5157,CVE-2015-5307,CVE-2015-6937,CVE-2015-7550,CVE-2015-7799,CVE-2015-7885,CVE-2015-7990,CVE-2015-8104,CVE-2015-8215,CVE-2015-8543,CVE-2015-8550,CVE-2015-8551,CVE-2015-8552,CVE-2015-8569,CVE-2015-8575,CVE-2015-8767,CVE-2016-0728
Sources used:
openSUSE 13.2 (src):    bbswitch-0.8-3.15.1, cloop-2.639-14.15.1, crash-7.0.8-15.1, hdjmod-1.28-18.16.1, ipset-6.23-15.1, kernel-debug-3.16.7-32.1, kernel-default-3.16.7-32.1, kernel-desktop-3.16.7-32.1, kernel-docs-3.16.7-32.2, kernel-ec2-3.16.7-32.1, kernel-obs-build-3.16.7-32.2, kernel-obs-qa-3.16.7-32.1, kernel-obs-qa-xen-3.16.7-32.1, kernel-pae-3.16.7-32.1, kernel-source-3.16.7-32.1, kernel-syms-3.16.7-32.1, kernel-vanilla-3.16.7-32.1, kernel-xen-3.16.7-32.1, pcfclock-0.44-260.15.1, vhba-kmp-20140629-2.15.1, virtualbox-4.3.34-37.1, xen-4.4.3_08-38.1, xtables-addons-2.6-15.1
Comment 23 Swamp Workflow Management 2016-02-05 20:23:05 UTC 
SUSE-SU-2016:0354-1: An update that solves 9 vulnerabilities and has 54 fixes is now available.

Category: security (important)
Bug References: 777565,814440,900610,904348,904965,920016,923002,926007,926709,926774,930145,930788,932350,932805,933721,935053,935757,936118,937969,937970,938706,939207,939826,939926,939955,940017,940925,941202,942204,942305,942367,942605,942688,942938,943786,944296,944831,944837,944989,944993,945691,945825,945827,946078,946309,947957,948330,948347,948521,949100,949298,949502,949706,949744,949981,951440,952084,952384,952579,953527,953980,954404,955354
CVE References: CVE-2015-0272,CVE-2015-5157,CVE-2015-5307,CVE-2015-6252,CVE-2015-6937,CVE-2015-7872,CVE-2015-7990,CVE-2015-8104,CVE-2015-8215
Sources used:
SUSE Linux Enterprise Real Time Extension 11-SP3 (src):    kernel-rt-3.0.101.rt130-0.33.44.2, kernel-rt_trace-3.0.101.rt130-0.33.44.2, kernel-source-rt-3.0.101.rt130-0.33.44.2, kernel-syms-rt-3.0.101.rt130-0.33.44.1
SUSE Linux Enterprise Debuginfo 11-SP3 (src):    kernel-rt-3.0.101.rt130-0.33.44.2, kernel-rt_trace-3.0.101.rt130-0.33.44.2
Comment 24 Marcus Meissner 2016-03-22 16:16:57 UTC 
released
Comment 25 Swamp Workflow Management 2016-08-15 14:10:34 UTC 
SUSE-SU-2016:2074-1: An update that solves 48 vulnerabilities and has 13 fixes is now available.

Category: security (important)
Bug References: 816446,861093,928130,935757,939826,942367,945825,946117,946309,948562,949744,949936,951440,952384,953527,954404,955354,955654,956708,956709,958463,958886,958951,959190,959399,961500,961509,961512,963765,963767,964201,966437,966460,966662,966693,967972,967973,967974,967975,968010,968011,968012,968013,968670,970504,970892,970909,970911,970948,970956,970958,970970,971124,971125,971126,971360,972510,973570,975945,977847,978822
CVE References: CVE-2013-2015,CVE-2013-7446,CVE-2015-0272,CVE-2015-3339,CVE-2015-5307,CVE-2015-6252,CVE-2015-6937,CVE-2015-7509,CVE-2015-7515,CVE-2015-7550,CVE-2015-7566,CVE-2015-7799,CVE-2015-7872,CVE-2015-7990,CVE-2015-8104,CVE-2015-8215,CVE-2015-8539,CVE-2015-8543,CVE-2015-8569,CVE-2015-8575,CVE-2015-8767,CVE-2015-8785,CVE-2015-8812,CVE-2015-8816,CVE-2016-0723,CVE-2016-2069,CVE-2016-2143,CVE-2016-2184,CVE-2016-2185,CVE-2016-2186,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-2016-3137,CVE-2016-3138,CVE-2016-3139,CVE-2016-3140,CVE-2016-3156,CVE-2016-4486
Sources used:
SUSE Linux Enterprise Server 11-SP2-LTSS (src):    kernel-default-3.0.101-0.7.40.1, kernel-ec2-3.0.101-0.7.40.1, kernel-pae-3.0.101-0.7.40.1, kernel-source-3.0.101-0.7.40.1, kernel-syms-3.0.101-0.7.40.1, kernel-trace-3.0.101-0.7.40.1, kernel-xen-3.0.101-0.7.40.1
SUSE Linux Enterprise Debuginfo 11-SP2 (src):    kernel-default-3.0.101-0.7.40.1, kernel-ec2-3.0.101-0.7.40.1, kernel-pae-3.0.101-0.7.40.1, kernel-trace-3.0.101-0.7.40.1, kernel-xen-3.0.101-0.7.40.1
Comment 26 Swamp Workflow Management 2016-10-26 16:10:42 UTC 
openSUSE-SU-2016:2649-1: An update that solves 49 vulnerabilities and has 17 fixes is now available.

Category: security (important)
Bug References: 1004418,758540,816446,861093,917648,928130,935757,939826,942367,944296,945825,946117,946309,948562,949744,949936,951440,952384,953527,954404,955354,955654,956708,956709,958463,958886,958951,959190,959399,961500,961509,961512,963765,963767,964201,966437,966460,966662,966693,967972,967973,967974,967975,968010,968011,968012,968013,968670,969356,970504,970892,970909,970911,970948,970956,970958,970970,971124,971125,971126,971360,972510,973570,975945,977847,978822
CVE References: CVE-2013-7446,CVE-2015-0272,CVE-2015-1339,CVE-2015-3339,CVE-2015-5307,CVE-2015-6252,CVE-2015-6937,CVE-2015-7509,CVE-2015-7515,CVE-2015-7550,CVE-2015-7566,CVE-2015-7799,CVE-2015-7872,CVE-2015-7990,CVE-2015-8104,CVE-2015-8215,CVE-2015-8539,CVE-2015-8543,CVE-2015-8569,CVE-2015-8575,CVE-2015-8767,CVE-2015-8785,CVE-2015-8812,CVE-2015-8816,CVE-2016-0723,CVE-2016-2069,CVE-2016-2143,CVE-2016-2184,CVE-2016-2185,CVE-2016-2186,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-2016-3137,CVE-2016-3138,CVE-2016-3139,CVE-2016-3140,CVE-2016-3156,CVE-2016-4486,CVE-2016-5195
Sources used:
openSUSE Evergreen 11.4 (src):    kernel-debug-3.0.101-105.1, kernel-default-3.0.101-105.1, kernel-desktop-3.0.101-105.1, kernel-docs-3.0.101-105.2, kernel-ec2-3.0.101-105.1, kernel-pae-3.0.101-105.1, kernel-source-3.0.101-105.1, kernel-syms-3.0.101-105.1, kernel-trace-3.0.101-105.1, kernel-vanilla-3.0.101-105.1, kernel-vmi-3.0.101-105.1, kernel-xen-3.0.101-105.1, preload-1.2-6.83.1