CVE-2021-27363

Advisory lineage Upstream: 0 Downstream: 44
Modified
Published: 07 Mar 2021, 03:55
Last modified:03 Aug 2024, 20:48

Vulnerability Summary

Overall Risk (default)
medium
28/100
CVSS Score
4.4 MEDIUM
v3.1 (nvd)
EPSS Score
0.04% LOW
0% probability -0.11%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

07 Mar 2021, 03:55
Published
Vulnerability first disclosed
03 Aug 2024, 20:48
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•MEDIUM•Score: 4.4CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
  • v2.0•LOW•Score: 3.6AV:L/AC:L/Au:N/C:P/I:N/A:P

EPSS Trends

Current EPSS score: 0.04%• Percentile: 11%

Affected Systems

  • debian•debian_linux

    9.0

  • linux•linux_kernel

    ≤ 5.11.3

  • netapp•cloud_backup

    na

  • netapp•solidfire_baseboard_management_controller_firmware

    na

References (8)