Bug 1930080 (CVE-2021-27364)

Summary: CVE-2021-27364 kernel: out-of-bounds read in libiscsi module
Product: [Other] Security Response Reporter: msiddiqu
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: acaringi, adscvr, airlied, alciregi, apmukher, asavkov, bhu, blc, bmasney, brdeoliv, bskeggs, chwhite, cleech, dhoward, dvlasenk, fhrbata, hartsjc, hdegoede, hkrzesin, jarodwilson, jeremy, jforbes, jglisse, jlelli, joe.lawrence, jonathan, josef, jpoimboe, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, kpatch-maint, lgoncalv, linville, masami256, mchehab, mlangsdo, nmurray, pmatouse, psampaio, ptalbert, qzhao, rhandlin, rvrbovsk, security-response-team, sgrubb, steved, tcrider, walters, williams, wmealing, ycote
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. An out-of-bounds read was discovered in the libiscsi module that could lead to reading kernel memory or a crash. The highest threat from this vulnerability is to data confidentiality as well as system availability.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2021-04-06 17:35:56 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: 1930820, 1930821, 1930822, 1930823, 1930824, 1930825, 1930826, 1930827, 1930828, 1930829, 1930830, 1930831, 1930832, 1930833, 1930834, 1930835, 1930836, 1930837, 1930838, 1930839, 1930840, 1930841, 1930842, 1931361, 1931362, 1931363, 1935907    
Bug Blocks: 1929972    

Description msiddiqu 2021-02-18 10:34:00 UTC 
An out-of-bounds read was discovered in the Linux kernel in the libiscsi module (drivers/scsi/libiscsi.c). This bug is triggered via a call to send_pdu
Comment 1 Wade Mealing 2021-02-19 03:29:55 UTC 
Mitigation:


The LIBISCSI module will be auto-loaded when required, its use can be disabled  by preventing the module from loading with the following instructions:

# echo "install libiscsi /bin/true" >> /etc/modprobe.d/disable-libiscsi.conf

The system will need to be restarted if the libiscsi modules are loaded. In most circumstances, the libiscsi kernel modules will be unable to be unloaded while any network interfaces are active and the protocol is in use.

If the system requires iscsi to work correctly, this mitigation may not be suitable.

If you need further assistance, see KCS article https://access.redhat.com/solutions/41278 or contact Red Hat Global Support Services.
Comment 4 Petr Matousek 2021-02-19 15:13:23 UTC 
Statement:

Red Hat Product Security is aware of this issue. Updates will be released as they become available.
Comment 8 Petr Matousek 2021-03-05 19:00:50 UTC 
Upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f9dbdf97a5bd92b1a49cee3d591b55b11fd7a6d5
Comment 9 Petr Matousek 2021-03-05 19:03:53 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1935907]
Comment 10 Petr Matousek 2021-03-06 16:53:22 UTC 
Acknowledgments:

Name: Adam Nichols (GRIMM)
Comment 12 Justin M. Forbes 2021-03-09 16:56:54 UTC 
This was fixed for Fedora with the 5.10.21 stable kernel updates.
Comment 16 errata-xmlrpc 2021-04-06 07:55:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:1070 https://access.redhat.com/errata/RHSA-2021:1070
Comment 17 errata-xmlrpc 2021-04-06 08:47:17 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:1069 https://access.redhat.com/errata/RHSA-2021:1069
Comment 18 errata-xmlrpc 2021-04-06 09:28:07 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:1071 https://access.redhat.com/errata/RHSA-2021:1071
Comment 19 errata-xmlrpc 2021-04-06 13:58:21 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:1081 https://access.redhat.com/errata/RHSA-2021:1081
Comment 20 errata-xmlrpc 2021-04-06 14:17:16 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:1093 https://access.redhat.com/errata/RHSA-2021:1093
Comment 21 Product Security DevOps Team 2021-04-06 17:35:56 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-27364
Comment 23 errata-xmlrpc 2021-04-13 10:36:48 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Extended Update Support

Via RHSA-2021:1173 https://access.redhat.com/errata/RHSA-2021:1173
Comment 24 errata-xmlrpc 2021-04-13 10:44:53 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Extended Update Support

Via RHSA-2021:1171 https://access.redhat.com/errata/RHSA-2021:1171
Comment 25 errata-xmlrpc 2021-04-20 12:54:19 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.4 Advanced Update Support
  Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions
  Red Hat Enterprise Linux 7.4 Telco Extended Update Support

Via RHSA-2021:1267 https://access.redhat.com/errata/RHSA-2021:1267
Comment 26 errata-xmlrpc 2021-04-20 13:02:47 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2021:1279 https://access.redhat.com/errata/RHSA-2021:1279
Comment 27 errata-xmlrpc 2021-04-20 13:16:47 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2021:1272 https://access.redhat.com/errata/RHSA-2021:1272
Comment 28 errata-xmlrpc 2021-04-20 15:13:05 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6 Extended Lifecycle Support

Via RHSA-2021:1288 https://access.redhat.com/errata/RHSA-2021:1288
Comment 29 errata-xmlrpc 2021-04-20 15:33:16 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.2 Advanced Update Support

Via RHSA-2021:1289 https://access.redhat.com/errata/RHSA-2021:1289
Comment 30 errata-xmlrpc 2021-04-20 20:47:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2021:1295 https://access.redhat.com/errata/RHSA-2021:1295
Comment 31 errata-xmlrpc 2021-04-27 06:51:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.3 Advanced Update Support

Via RHSA-2021:1373 https://access.redhat.com/errata/RHSA-2021:1373
Comment 32 errata-xmlrpc 2021-04-27 07:21:10 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:1379 https://access.redhat.com/errata/RHSA-2021:1379
Comment 33 errata-xmlrpc 2021-04-27 08:31:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.6 Extended Update Support

Via RHSA-2021:1376 https://access.redhat.com/errata/RHSA-2021:1376
Comment 34 errata-xmlrpc 2021-04-27 08:31:40 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.6 Extended Update Support

Via RHSA-2021:1377 https://access.redhat.com/errata/RHSA-2021:1377
Comment 36 errata-xmlrpc 2021-05-11 12:30:23 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.7 Extended Update Support

Via RHSA-2021:1531 https://access.redhat.com/errata/RHSA-2021:1531
Comment 37 errata-xmlrpc 2021-05-11 12:30:42 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.7 Extended Update Support

Via RHSA-2021:1532 https://access.redhat.com/errata/RHSA-2021:1532