CVE-2021-27365: Buffer Overflow
First published: Thu Feb 18 2021(Updated: )
A flaw was found in the Linux kernel. A heap buffer overflow in the iSCSI subsystem is triggered by setting an iSCSI string attribute to a value larger than one page and then trying to read it. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <0:2.6.32-754.39.1.el6 | 0:2.6.32-754.39.1.el6 |
| 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-alt | <0:4.14.0-115.36.1.el7a | 0:4.14.0-115.36.1.el7a |
| 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 | |
| Oracle Tekelec Platform Distribution | >=7.4.0<=7.7.1 | |
| All of | ||
| Netapp Solidfire Baseboard Management Controller Firmware | ||
| Netapp Solidfire Baseboard Management Controller | ||
| Netapp Solidfire Baseboard Management Controller Firmware | ||
| Netapp Solidfire Baseboard Management Controller | ||
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.7-1 6.11.9-1 |
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-2021-27365 https://nvd.nist.gov/vuln/detail/CVE-2021-27365 https://www.openwall.com/lists/oss-security/2021/03/06/1
- https://bugzilla.redhat.com/show_bug.cgi?id=1930078
- https://access.redhat.com/errata/RHSA-2021:1288
- https://access.redhat.com/errata/RHSA-2021:1070
- https://access.redhat.com/errata/RHSA-2021:1069
- https://access.redhat.com/errata/RHSA-2021:1071
- https://access.redhat.com/errata/RHSA-2021:1379
- 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-2021:1377
- https://access.redhat.com/errata/RHSA-2021:1531
- https://access.redhat.com/errata/RHSA-2021:1532
- 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-2021:1173
- https://access.redhat.com/errata/RHSA-2021:1279
- https://access.redhat.com/errata/RHSA-2021:1272
- https://access.redhat.com/errata/RHSA-2021:1295
- https://access.redhat.com/security/cve/cve-2021-27365
- https://bugzilla.suse.com/show_bug.cgi?id=1182715
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ec98ea7070e94cc25a422ec97d1421e28d97b7ee
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f9dbdf97a5bd92b1a49cee3d591b55b11fd7a6d5
- https://www.openwall.com/lists/oss-security/2021/03/06/1
- https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
- https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.html
- https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html
- http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html
- https://security.netapp.com/advisory/ntap-20210409-0001/
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://launchpad.net/bugs/cve/CVE-2021-27365
- https://access.redhat.com/solutions/41278
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1935902
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1939429
- https://git.kernel.org/linus/ec98ea7070e94cc25a422ec97d1421e28d97b7ee
- https://git.kernel.org/linus/f9dbdf97a5bd92b1a49cee3d591b55b11fd7a6d5
- https://security-tracker.debian.org/tracker/CVE-2021-27365
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27365
- https://nvd.nist.gov/vuln/detail/CVE-2021-27365
- https://ubuntu.com/security/CVE-2021-27365
Parent vulnerabilities
(Appears in the following advisories)
- collector/redhat-cve
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- agent/severity
- agent/weakness
- agent/remedy
- agent/description
- agent/references
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- collector/nvd-index
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2021-27365
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/event
- agent/tags
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/usn-cve
- source/Ubuntu
- 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/oracle
- canonical/oracle tekelec platform distribution
- version/oracle tekelec platform distribution/7.4.0
- version/oracle tekelec platform distribution/7.7.1
- vendor/netapp
- canonical/netapp solidfire baseboard management controller firmware
- canonical/netapp solidfire baseboard management controller
- package-manager/debian