Vulnerability Description
An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module's global variables.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 5.11.3 |
| Debian | Debian Linux | 9.0 |
| Netapp | Cloud Backup | - |
| Netapp | Solidfire Baseboard Management Controller Firmware | - |
References
- http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSThird Party AdvisoryVDB Entry
- http://www.openwall.com/lists/oss-security/2021/03/06/1Mailing ListPatchThird Party Advisory
- https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.htmlExploitThird Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1182716Issue TrackingThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=68Mailing ListPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/03/msg00035.htmlThird Party Advisory
- https://security.netapp.com/advisory/ntap-20210409-0001/Third Party Advisory
- http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSThird Party AdvisoryVDB Entry
- http://www.openwall.com/lists/oss-security/2021/03/06/1Mailing ListPatchThird Party Advisory
- https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.htmlExploitThird Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1182716Issue TrackingThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=68Mailing ListPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/03/msg00035.htmlThird Party Advisory
FAQ
What is CVE-2021-27363?
CVE-2021-27363 is a vulnerability with a CVSS score of 4.4 (MEDIUM). An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the ...
How severe is CVE-2021-27363?
CVE-2021-27363 has been rated MEDIUM with a CVSS base score of 4.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-27363?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux, Netapp Cloud Backup, Netapp Solidfire Baseboard Management Controller Firmware.