CVE-2021-27363

Aliases:UBUNTU-CVE-2021-27363DEBIAN-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
0.71% LOW
1% probability +0.57%
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: 0.71%• Percentile: 52%

Affected Systems

  • debian•linux

    < 5.10.24-1 | < 5.10.24-1 | < 5.10.24-1 | < 5.10.24-1

  • ubuntu•linux

    < 3.13.0-185.236 | < 4.4.0-206.238 | < 4.15.0-139.143 | < 5.4.0-70.78

  • ubuntu•linux-aws

    < 4.4.0-1088.92 | < 4.4.0-1124.138 | < 4.15.0-1096.103 | < 5.4.0-1041.43

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1041.43~18.04.1

  • ubuntu•linux-aws-fips

    < 4.15.0-2039.41 | all | < 5.4.0-1069.73+fips2

  • ubuntu•linux-aws-hwe

    < 4.15.0-1096.103~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1110.122~14.04.1 | < 4.15.0-1110.122~16.04.1 | all | < 5.4.0-1043.45

  • ubuntu•linux-azure-4.15

    < 4.15.0-1110.122

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1043.45~18.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fde-5.15

    < 5.15.0-1114.123~20.04.1

  • ubuntu•linux-azure-fips

    < 4.15.0-2022.25 | all | < 5.4.0-1073.76+fips1

  • ubuntu•linux-bluefield

    all

  • ubuntu•linux-dell300x

    < 4.15.0-1015.19

  • ubuntu•linux-fips

    < 4.4.0-1058.64 | all | < 4.15.0-1055.63

  • ubuntu•linux-gcp

    < 4.15.0-1095.108~16.04.1 | all | < 5.4.0-1040.43

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1095.108

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1040.43~18.04.1

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-gcp-fips

    all | < 5.4.0-1067.71~20.04.1

  • ubuntu•linux-gke

    < 5.4.0-1039.41

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-gke-5.3

    < 5.3.0-1041.44

  • ubuntu•linux-gke-5.4

    < 5.4.0-1039.41~18.04.1

  • ubuntu•linux-gkeop

    < 5.4.0-1012.13

  • ubuntu•linux-gkeop-5.4

    < 5.4.0-1012.13~18.04.1

  • ubuntu•linux-hwe

    < 4.15.0-139.143~16.04.1 | < 5.3.0-72.68

  • ubuntu•linux-hwe-5.4

    < 5.4.0-70.78~18.04.1

  • ubuntu•linux-hwe-5.8

    < 5.8.0-48.54~20.04.1

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.4.0-1090.99 | < 4.15.0-1087.89 | < 5.4.0-1036.37

  • ubuntu•linux-lts-xenial

    < 4.4.0-206.238~14.04.1

  • ubuntu•linux-oem

    all

  • ubuntu•linux-oem-5.10

    < 5.10.0-1019.20

  • ubuntu•linux-oem-5.6

    < 5.6.0-1052.56

  • ubuntu•linux-oracle

    < 4.15.0-1067.75~16.04.1 | < 4.15.0-1067.75 | < 5.4.0-1041.44

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.3

    all

  • ubuntu•linux-oracle-5.4

    < 5.4.0-1041.44~18.04.1

  • ubuntu•linux-raspi

    < 5.4.0-1032.35

  • ubuntu•linux-raspi-5.4

    < 5.4.0-1032.35~18.04.1

  • ubuntu•linux-raspi-realtime

    all

  • ubuntu•linux-raspi2

    < 4.4.0-1148.158 | < 4.15.0-1081.86 | all

  • ubuntu•linux-raspi2-5.3

    < 5.3.0-1038.40

  • ubuntu•linux-realtime

    all

Showing first 50 affected entries in server-rendered view.

References (16)