Bug 1197386 - (CVE-2022-0494) VUL-0: CVE-2022-0494: kernel-source-azure,kernel-source-rt,kernel-source: information leak in scsi_ioctl()
(CVE-2022-0494)
VUL-0: CVE-2022-0494: kernel-source-azure,kernel-source-rt,kernel-source: inf...
Status: IN_PROGRESS
Classification: Novell Products
Product: SUSE Security Incidents
Classification: Novell Products
Component: Incidents
unspecified
Other Other
: P3 - Medium : Normal
: ---
Assigned To: Security Team bot
Security Team bot
https://smash.suse.de/issue/326886/
CVSSv3.1:SUSE:CVE-2022-0494:6.2:(AV:L...
:
Depends on:
Blocks:
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Reported: 2022-03-22 10:17 UTC by Thomas Leroy
Modified: 2022-08-01 13:32 UTC (History)
7 users (show)

See Also:
Found By: Security Response Team
Services Priority:
Business Priority:
Blocker: ---
Marketing QA Status: ---
IT Deployment: ---
lduncan: needinfo? (hare)
lduncan: needinfo? (thomas.leroy)


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Description Thomas Leroy 2022-03-22 10:17:20 UTC
rh#2039448

A flaw was found in the linux kernel in scsi_ioctl() function. If the parameter cmd is SCSI_IOCTL_SEND_COMMAND, the function scsi_ioctl will call sg_scsi_ioctl to further process. In function sg_scsi_ioctl, it creates a scsi request and calls blk_rq_map_kern to allocate the internal buffer of this request, but the internal buffer doesn't get zeroed properly. Then this request will be sent to the disk driver, but the disk driver doesn't fill anything into it. Finally, the internal buffer's content is copied to the user buffer which is specified by the parameter sic->data of sg_scsi_ioctl.

Upstream fix commit:
https://github.com/torvalds/linux/commit/cc8f7fe1f5eab010191aa4570f27641876fa1267


Reference:
https://lore.kernel.org/all/20220216084038.15635-1-tcs.kernel@gmail.com/

References:
https://bugzilla.redhat.com/show_bug.cgi?id=2039448
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-0494
Comment 1 Thomas Leroy 2022-03-22 11:07:17 UTC
From what I saw, there should be  way to trigger the leak through a non-privilege ioctl command. But RH rated this issue with high privileged required, so I'm maybe wrong. If indeed there is no way to trigger the leak from an unprivileged call, this would become a VUL-1.
Btw, the ioctl command used to trigger the bug is currently deprecated.

Anyway, it seems that it is a more general issue than just in the scsi_ioctl. So I considered that the commit that introduced `page = alloc_page(GFP_NOIO | gfp_mask);` is the one that introduced the bug, but again, I'm maybe wrong...
It would be this commit I think:
https://github.com/torvalds/linux/commit/42d2683a2704ef4bbbb07fd0b9486ab312dd8c56

The fixing commit is only present on stable branch, that would make the following branches affected:
- SLE12-SP5
- SLE15-SP3
- SLE15-SP4-GA
- cve/linux-4.12
- cve/linux-4.4
- cve/linux-5.3
Comment 2 Takashi Iwai 2022-03-22 20:48:28 UTC
Something for storage team?
Comment 5 Lee Duncan 2022-04-07 17:43:14 UTC
Submitted to users/lduncan/SLE15-SP4/for-next

Not needed in cve/linux-4.4 or cve/linux-5.3

- cve/linux-4.4
- cve/linux-5.3
Comment 6 Lee Duncan 2022-04-07 17:48:57 UTC
Also not needed in cve/linux-4.4
Comment 7 Lee Duncan 2022-04-07 17:57:58 UTC
Also not needed in SLE-15-SP3. Strange. Am I missing something?
Comment 8 Lee Duncan 2022-04-07 18:02:42 UTC
Also not needed in SLE-12-SP5.
Comment 9 Lee Duncan 2022-04-07 18:13:45 UTC
Note: perhaps some of my issue has to do with this:

The page says replace this:

>               page = alloc_page(GFP_NOIO | gfp_mask);

with this:

>               page = alloc_page(GFP_NOIO | __GFP_ZERO | gfp_mask);
                                           ^^^^^^^^^^^^
                                             added

in the function bio_copy_kern(), which is in block/blk-map.c. But the older releases have this function in block/bio.c, and the call looks like this:

>                 page = alloc_page(q->bounce_gfp | gfp_mask);

Ignoring the move of this function, I'm just not sure that "q->bounce_gfp" needs the __GFP_ZERO flag added.

Can anyone help? Hannes? Thomas?
Comment 11 Lee Duncan 2022-04-26 16:37:58 UTC
Having not heard from anyone, I will assign this back to security.
Comment 24 Swamp Workflow Management 2022-07-21 22:30:51 UTC
SUSE-SU-2022:2520-1: An update that solves 49 vulnerabilities, contains 26 features and has 207 fixes is now available.

Category: security (important)
Bug References: 1055117,1061840,1065729,1071995,1089644,1103269,1118212,1121726,1137728,1156395,1157038,1157923,1175667,1179439,1179639,1180814,1183682,1183872,1184318,1184924,1187716,1188885,1189998,1190137,1190208,1190336,1190497,1190768,1190786,1190812,1191271,1191663,1192483,1193064,1193277,1193289,1193431,1193556,1193629,1193640,1193787,1193823,1193852,1194086,1194111,1194191,1194409,1194501,1194523,1194526,1194583,1194585,1194586,1194625,1194765,1194826,1194869,1195099,1195287,1195478,1195482,1195504,1195651,1195668,1195669,1195775,1195823,1195826,1195913,1195915,1195926,1195944,1195957,1195987,1196079,1196114,1196130,1196213,1196306,1196367,1196400,1196426,1196478,1196514,1196570,1196723,1196779,1196830,1196836,1196866,1196868,1196869,1196901,1196930,1196942,1196960,1197016,1197157,1197227,1197243,1197292,1197302,1197303,1197304,1197362,1197386,1197501,1197601,1197661,1197675,1197761,1197817,1197819,1197820,1197888,1197889,1197894,1197915,1197917,1197918,1197920,1197921,1197922,1197926,1198009,1198010,1198012,1198013,1198014,1198015,1198016,1198017,1198018,1198019,1198020,1198021,1198022,1198023,1198024,1198027,1198030,1198034,1198058,1198217,1198379,1198400,1198402,1198410,1198412,1198413,1198438,1198484,1198577,1198585,1198660,1198802,1198803,1198806,1198811,1198826,1198829,1198835,1198968,1198971,1199011,1199024,1199035,1199046,1199052,1199063,1199163,1199173,1199260,1199314,1199390,1199426,1199433,1199439,1199482,1199487,1199505,1199507,1199605,1199611,1199626,1199631,1199650,1199657,1199674,1199736,1199793,1199839,1199875,1199909,1200015,1200019,1200045,1200046,1200144,1200205,1200211,1200259,1200263,1200284,1200315,1200343,1200420,1200442,1200475,1200502,1200567,1200569,1200571,1200599,1200600,1200608,1200611,1200619,1200692,1200762,1200763,1200806,1200807,1200808,1200809,1200810,1200812,1200813,1200815,1200816,1200820,1200821,1200822,1200824,1200825,1200827,1200828,1200829,1200830,1200845,1200882,1200925,1201050,1201080,1201160,1201171,1201177,1201193,1201196,1201218,1201222,1201228,1201251,1201381,1201471,1201524
CVE References: CVE-2021-26341,CVE-2021-33061,CVE-2021-4204,CVE-2021-44879,CVE-2021-45402,CVE-2022-0264,CVE-2022-0494,CVE-2022-0617,CVE-2022-1012,CVE-2022-1016,CVE-2022-1184,CVE-2022-1198,CVE-2022-1205,CVE-2022-1462,CVE-2022-1508,CVE-2022-1651,CVE-2022-1652,CVE-2022-1671,CVE-2022-1679,CVE-2022-1729,CVE-2022-1734,CVE-2022-1789,CVE-2022-1852,CVE-2022-1966,CVE-2022-1972,CVE-2022-1974,CVE-2022-1998,CVE-2022-20132,CVE-2022-20154,CVE-2022-21123,CVE-2022-21125,CVE-2022-21127,CVE-2022-21166,CVE-2022-21180,CVE-2022-21499,CVE-2022-2318,CVE-2022-23222,CVE-2022-26365,CVE-2022-26490,CVE-2022-29582,CVE-2022-29900,CVE-2022-29901,CVE-2022-30594,CVE-2022-33740,CVE-2022-33741,CVE-2022-33742,CVE-2022-33743,CVE-2022-33981,CVE-2022-34918
JIRA References: SLE-13513,SLE-13521,SLE-15442,SLE-17855,SLE-18194,SLE-18234,SLE-18375,SLE-18377,SLE-18378,SLE-18382,SLE-18385,SLE-18901,SLE-18938,SLE-18978,SLE-19001,SLE-19026,SLE-19242,SLE-19249,SLE-19253,SLE-19924,SLE-21315,SLE-23643,SLE-24072,SLE-24093,SLE-24350,SLE-24549
Sources used:
openSUSE Leap 15.4 (src):    dtb-aarch64-5.14.21-150400.24.11.1, kernel-64kb-5.14.21-150400.24.11.1, kernel-debug-5.14.21-150400.24.11.1, kernel-default-5.14.21-150400.24.11.1, kernel-default-base-5.14.21-150400.24.11.1.150400.24.3.6, kernel-docs-5.14.21-150400.24.11.1, kernel-kvmsmall-5.14.21-150400.24.11.1, kernel-obs-build-5.14.21-150400.24.11.1, kernel-obs-qa-5.14.21-150400.24.11.1, kernel-source-5.14.21-150400.24.11.1, kernel-syms-5.14.21-150400.24.11.1, kernel-zfcpdump-5.14.21-150400.24.11.1
SUSE Linux Enterprise Workstation Extension 15-SP4 (src):    kernel-default-5.14.21-150400.24.11.1
SUSE Linux Enterprise Module for Live Patching 15-SP4 (src):    kernel-default-5.14.21-150400.24.11.1, kernel-livepatch-SLE15-SP4_Update_1-1-150400.9.5.3
SUSE Linux Enterprise Module for Legacy Software 15-SP4 (src):    kernel-default-5.14.21-150400.24.11.1
SUSE Linux Enterprise Module for Development Tools 15-SP4 (src):    kernel-docs-5.14.21-150400.24.11.1, kernel-obs-build-5.14.21-150400.24.11.1, kernel-source-5.14.21-150400.24.11.1, kernel-syms-5.14.21-150400.24.11.1
SUSE Linux Enterprise Module for Basesystem 15-SP4 (src):    kernel-64kb-5.14.21-150400.24.11.1, kernel-default-5.14.21-150400.24.11.1, kernel-default-base-5.14.21-150400.24.11.1.150400.24.3.6, kernel-source-5.14.21-150400.24.11.1, kernel-zfcpdump-5.14.21-150400.24.11.1
SUSE Linux Enterprise High Availability 15-SP4 (src):    kernel-default-5.14.21-150400.24.11.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
Comment 26 Swamp Workflow Management 2022-08-01 13:32:37 UTC
SUSE-SU-2022:2615-1: An update that solves 48 vulnerabilities, contains 26 features and has 202 fixes is now available.

Category: security (important)
Bug References: 1055117,1061840,1065729,1071995,1089644,1103269,1118212,1121726,1137728,1156395,1157038,1157923,1175667,1179439,1179639,1180814,1183682,1183872,1184318,1184924,1187716,1188885,1189998,1190137,1190208,1190336,1190497,1190768,1190786,1190812,1191271,1191663,1192483,1193064,1193277,1193289,1193431,1193556,1193629,1193640,1193787,1193823,1193852,1194086,1194111,1194191,1194409,1194501,1194523,1194526,1194583,1194585,1194586,1194625,1194765,1194826,1194869,1195099,1195287,1195478,1195482,1195504,1195651,1195668,1195669,1195775,1195823,1195826,1195913,1195915,1195926,1195944,1195957,1195987,1196079,1196114,1196130,1196213,1196306,1196367,1196400,1196426,1196478,1196514,1196570,1196723,1196779,1196830,1196836,1196866,1196868,1196869,1196901,1196930,1196942,1196960,1197016,1197157,1197227,1197243,1197292,1197302,1197303,1197304,1197362,1197386,1197501,1197601,1197661,1197675,1197761,1197817,1197819,1197820,1197888,1197889,1197894,1197915,1197917,1197918,1197920,1197921,1197922,1197926,1198009,1198010,1198012,1198013,1198014,1198015,1198016,1198017,1198018,1198019,1198020,1198021,1198022,1198023,1198024,1198027,1198030,1198034,1198058,1198217,1198379,1198400,1198402,1198412,1198413,1198438,1198484,1198577,1198585,1198660,1198802,1198803,1198806,1198811,1198826,1198835,1198968,1198971,1199011,1199024,1199035,1199046,1199052,1199063,1199163,1199173,1199260,1199314,1199390,1199426,1199433,1199439,1199482,1199487,1199505,1199507,1199605,1199611,1199626,1199631,1199650,1199657,1199674,1199736,1199793,1199839,1199875,1199909,1200015,1200019,1200045,1200046,1200144,1200205,1200211,1200259,1200263,1200284,1200315,1200343,1200420,1200442,1200475,1200502,1200567,1200569,1200571,1200572,1200599,1200600,1200608,1200611,1200619,1200692,1200762,1200763,1200806,1200807,1200808,1200809,1200810,1200812,1200815,1200816,1200820,1200822,1200824,1200825,1200827,1200828,1200829,1200830,1200845,1200882,1200925,1201050,1201160,1201171,1201177,1201193,1201196,1201218,1201222,1201228,1201251,150300
CVE References: CVE-2021-26341,CVE-2021-33061,CVE-2021-4204,CVE-2021-44879,CVE-2021-45402,CVE-2022-0264,CVE-2022-0494,CVE-2022-0617,CVE-2022-1012,CVE-2022-1016,CVE-2022-1184,CVE-2022-1198,CVE-2022-1205,CVE-2022-1508,CVE-2022-1651,CVE-2022-1652,CVE-2022-1671,CVE-2022-1679,CVE-2022-1729,CVE-2022-1734,CVE-2022-1789,CVE-2022-1852,CVE-2022-1966,CVE-2022-1972,CVE-2022-1974,CVE-2022-1998,CVE-2022-20132,CVE-2022-20154,CVE-2022-21123,CVE-2022-21125,CVE-2022-21127,CVE-2022-21166,CVE-2022-21180,CVE-2022-21499,CVE-2022-2318,CVE-2022-23222,CVE-2022-26365,CVE-2022-26490,CVE-2022-29582,CVE-2022-29900,CVE-2022-29901,CVE-2022-30594,CVE-2022-33740,CVE-2022-33741,CVE-2022-33742,CVE-2022-33743,CVE-2022-33981,CVE-2022-34918
JIRA References: SLE-13513,SLE-13521,SLE-15442,SLE-17855,SLE-18194,SLE-18234,SLE-18375,SLE-18377,SLE-18378,SLE-18382,SLE-18385,SLE-18901,SLE-18938,SLE-18978,SLE-19001,SLE-19026,SLE-19242,SLE-19249,SLE-19253,SLE-19924,SLE-21315,SLE-23643,SLE-24072,SLE-24093,SLE-24350,SLE-24549
Sources used:
openSUSE Leap 15.4 (src):    kernel-azure-5.14.21-150400.14.7.1, kernel-source-azure-5.14.21-150400.14.7.1, kernel-syms-azure-5.14.21-150400.14.7.1
SUSE Linux Enterprise Module for Public Cloud 15-SP4 (src):    kernel-azure-5.14.21-150400.14.7.1, kernel-source-azure-5.14.21-150400.14.7.1, kernel-syms-azure-5.14.21-150400.14.7.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.