CVE-2021-27363: Infoleak
First published: Thu Feb 18 2021(Updated: )
A flaw was found in the way access to sessions and handles was handled in the iSCSI driver in the Linux kernel. A local user could use this flaw to leak iSCSI transport handle kernel address or end arbitrary iSCSI connections on the system.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:3.10.0-1160.24.1.rt56.1161.el7 | 0:3.10.0-1160.24.1.rt56.1161.el7 |
| redhat/kernel | <0:3.10.0-1160.24.1.el7 | 0:3.10.0-1160.24.1.el7 |
| redhat/kernel | <0:3.10.0-327.96.1.el7 | 0:3.10.0-327.96.1.el7 |
| redhat/kernel | <0:3.10.0-514.88.1.el7 | 0:3.10.0-514.88.1.el7 |
| redhat/kernel | <0:3.10.0-693.84.1.el7 | 0:3.10.0-693.84.1.el7 |
| redhat/kernel | <0:3.10.0-957.72.1.el7 | 0:3.10.0-957.72.1.el7 |
| redhat/kernel | <0:3.10.0-1062.49.1.el7 | 0:3.10.0-1062.49.1.el7 |
| redhat/kernel-rt | <0:4.18.0-240.22.1.rt7.77.el8_3 | 0:4.18.0-240.22.1.rt7.77.el8_3 |
| redhat/kernel | <0:4.18.0-240.22.1.el8_3 | 0:4.18.0-240.22.1.el8_3 |
| redhat/kernel | <0:4.18.0-147.44.1.el8_1 | 0:4.18.0-147.44.1.el8_1 |
| redhat/kernel-rt | <0:4.18.0-193.51.1.rt13.101.el8_2 | 0:4.18.0-193.51.1.rt13.101.el8_2 |
| redhat/kernel | <0:4.18.0-193.51.1.el8_2 | 0:4.18.0-193.51.1.el8_2 |
| Linux Linux kernel | <=5.11.3 | |
| Debian Debian Linux | =9.0 | |
| Netapp Cloud Backup | ||
| Netapp Solidfire Baseboard Management Controller Firmware | ||
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
Remedy
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.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-27363 https://nvd.nist.gov/vuln/detail/CVE-2021-27363 https://www.openwall.com/lists/oss-security/2021/03/06/1
- https://bugzilla.redhat.com/show_bug.cgi?id=1930079
- https://access.redhat.com/errata/RHSA-2021:1070
- https://access.redhat.com/errata/RHSA-2021:1071
- https://access.redhat.com/errata/RHSA-2021:1289
- https://access.redhat.com/errata/RHSA-2021:1373
- https://access.redhat.com/errata/RHSA-2021:1267
- https://access.redhat.com/errata/RHSA-2021:1376
- https://access.redhat.com/errata/RHSA-2021:1531
- https://access.redhat.com/errata/RHSA-2021:1081
- https://access.redhat.com/errata/RHSA-2021:1093
- https://access.redhat.com/errata/RHSA-2021:1171
- https://access.redhat.com/errata/RHSA-2021:1279
- https://access.redhat.com/errata/RHSA-2021:1272
- https://access.redhat.com/security/cve/cve-2021-27363
- http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html
- http://www.openwall.com/lists/oss-security/2021/03/06/1
- https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.html
- https://bugzilla.suse.com/show_bug.cgi?id=1182716
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=688e8128b7a92df982709a4137ea4588d16f24aa
- https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
- https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html
- https://security.netapp.com/advisory/ntap-20210409-0001/
- https://launchpad.net/bugs/cve/CVE-2021-27363
- https://access.redhat.com/solutions/41278
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1935903
- https://www.openwall.com/lists/oss-security/2021/03/06/1
- https://git.kernel.org/linus/688e8128b7a92df982709a4137ea4588d16f24aa
- https://security-tracker.debian.org/tracker/CVE-2021-27363
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27363
- https://nvd.nist.gov/vuln/detail/CVE-2021-27363
- https://ubuntu.com/security/CVE-2021-27363
Parent vulnerabilities
(Appears in the following advisories)
- collector/redhat-cve
- collector/nvd-index
- agent/type
- collector/launchpad-cve
- source/Launchpad
- agent/first-publish-date
- agent/author
- agent/severity
- agent/weakness
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/remedy
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2021-27363
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/tags
- agent/event
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- agent/last-modified-date
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- agent/trending
- package-manager/redhat
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/5.11.3
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0
- vendor/netapp
- canonical/netapp cloud backup
- canonical/netapp solidfire baseboard management controller firmware
- package-manager/debian