UBUNTU-CVE-2021-45100

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Source
https://ubuntu.com/security/CVE-2021-45100
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-45100.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2021-45100
Upstream
Published
2021-12-16T05:15:00Z
Modified
2025-07-18T16:47:04Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

The ksmbd server through 3.4.2, as used in the Linux kernel through 5.15.8, sometimes communicates in cleartext even though encryption has been enabled. This occurs because it sets the SMB2GLOBALCAP_ENCRYPTION flag when using the SMB 3.1.1 protocol, which is a violation of the SMB protocol specification. When Windows 10 detects this protocol violation, it disables encryption.

References

Affected packages

Ubuntu:Pro:16.04:LTS / linux-hwe-edge

Package

Name
linux-hwe-edge
Purl
pkg:deb/ubuntu/linux-hwe-edge@4.15.0-23.25~16.04.1?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.8.0-28.30~16.04.1
4.8.0-30.32~16.04.1
4.8.0-32.34~16.04.1
4.8.0-34.36~16.04.1
4.10.0-14.16~16.04.1
4.10.0-19.21~16.04.1
4.10.0-20.22~16.04.1
4.10.0-21.23~16.04.1
4.10.0-22.24~16.04.1
4.10.0-24.28~16.04.1
4.10.0-26.30~16.04.1
4.11.0-13.19~16.04.1
4.11.0-14.20~16.04.1
4.13.0-16.19~16.04.3
4.13.0-17.20~16.04.1
4.13.0-19.22~16.04.1
4.13.0-21.24~16.04.1
4.13.0-25.29~16.04.2
4.15.0-13.14~16.04.1
4.15.0-15.16~16.04.1
4.15.0-20.21~16.04.1
4.15.0-22.24~16.04.1
4.15.0-23.25~16.04.1

Ubuntu:Pro:18.04:LTS / linux-aws-5.0

Package

Name
linux-aws-5.0
Purl
pkg:deb/ubuntu/linux-aws-5.0@5.0.0-1027.30?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.0.0-1021.24~18.04.1
5.0.0-1022.25~18.04.1
5.0.0-1023.26~18.04.1
5.0.0-1024.27~18.04.1
5.0.0-1025.28
5.0.0-1027.30

Ubuntu:Pro:18.04:LTS / linux-aws-5.3

Package

Name
linux-aws-5.3
Purl
pkg:deb/ubuntu/linux-aws-5.3@5.3.0-1035.37?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.3.0-1016.17~18.04.1
5.3.0-1017.18~18.04.1
5.3.0-1019.21~18.04.1
5.3.0-1023.25~18.04.1
5.3.0-1028.30~18.04.1
5.3.0-1030.32~18.04.1
5.3.0-1032.34~18.04.2
5.3.0-1033.35
5.3.0-1034.36
5.3.0-1035.37

Ubuntu:Pro:18.04:LTS / linux-azure

Package

Name
linux-azure
Purl
pkg:deb/ubuntu/linux-azure@5.0.0-1036.38?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.15.0-1002.2
4.15.0-1003.3
4.15.0-1004.4
4.15.0-1008.8
4.15.0-1009.9
4.15.0-1012.12
4.15.0-1013.13
4.15.0-1014.14
4.15.0-1018.18
4.15.0-1019.19
4.15.0-1021.21
4.15.0-1022.23
4.15.0-1023.24
4.15.0-1025.26
4.15.0-1028.29
4.15.0-1030.31
4.15.0-1031.32
4.15.0-1032.33
4.15.0-1035.36
4.15.0-1036.38
4.15.0-1037.39
4.18.0-1011.11~18.04.1
4.18.0-1013.13~18.04.1
4.18.0-1014.14~18.04.1
4.18.0-1018.18~18.04.1
4.18.0-1019.19~18.04.1
4.18.0-1020.20~18.04.1
4.18.0-1023.24~18.04.1
4.18.0-1024.25~18.04.1
4.18.0-1025.27~18.04.1

5.*

5.0.0-1014.14~18.04.1
5.0.0-1016.17~18.04.1
5.0.0-1018.19~18.04.1
5.0.0-1020.21~18.04.1
5.0.0-1022.23~18.04.1
5.0.0-1023.24~18.04.1
5.0.0-1025.27~18.04.1
5.0.0-1027.29~18.04.1
5.0.0-1028.30~18.04.1
5.0.0-1029.31~18.04.1
5.0.0-1031.33
5.0.0-1032.34
5.0.0-1035.37
5.0.0-1036.38

Ubuntu:Pro:18.04:LTS / linux-azure-5.3

Package

Name
linux-azure-5.3
Purl
pkg:deb/ubuntu/linux-azure-5.3@5.3.0-1035.36?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.3.0-1007.8~18.04.1
5.3.0-1008.9~18.04.1
5.3.0-1009.10~18.04.1
5.3.0-1010.11~18.04.1
5.3.0-1012.13~18.04.1
5.3.0-1013.14~18.04.1
5.3.0-1016.17~18.04.1
5.3.0-1018.19~18.04.1
5.3.0-1019.20~18.04.1
5.3.0-1020.21~18.04.1
5.3.0-1022.23~18.04.1
5.3.0-1028.29~18.04.1
5.3.0-1031.32~18.04.1
5.3.0-1032.33~18.04.1
5.3.0-1034.35~18.04.1
5.3.0-1035.36

Ubuntu:Pro:18.04:LTS / linux-azure-edge

Package

Name
linux-azure-edge
Purl
pkg:deb/ubuntu/linux-azure-edge@5.0.0-1012.12~18.04.2?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.18.0-1006.6~18.04.1
4.18.0-1007.7~18.04.1
4.18.0-1008.8~18.04.1

5.*

5.0.0-1012.12~18.04.2

Ubuntu:Pro:18.04:LTS / linux-gcp

Package

Name
linux-gcp
Purl
pkg:deb/ubuntu/linux-gcp@5.0.0-1034.35?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.15.0-1001.1
4.15.0-1003.3
4.15.0-1005.5
4.15.0-1006.6
4.15.0-1008.8
4.15.0-1009.9
4.15.0-1010.10
4.15.0-1014.14
4.15.0-1015.15
4.15.0-1017.18
4.15.0-1018.19
4.15.0-1019.20
4.15.0-1021.22
4.15.0-1023.24
4.15.0-1024.25
4.15.0-1025.26
4.15.0-1026.27
4.15.0-1027.28
4.15.0-1028.29
4.15.0-1029.31
4.15.0-1030.32
4.15.0-1032.34
4.15.0-1033.35
4.15.0-1034.36
4.15.0-1036.38
4.15.0-1037.39
4.15.0-1040.42
4.15.0-1042.45
4.15.0-1044.70

5.*

5.0.0-1020.20~18.04.1
5.0.0-1021.21~18.04.1
5.0.0-1025.26~18.04.1
5.0.0-1026.27~18.04.1
5.0.0-1028.29~18.04.1
5.0.0-1029.30~18.04.1
5.0.0-1031.32
5.0.0-1033.34
5.0.0-1034.35

Ubuntu:Pro:18.04:LTS / linux-gcp-5.3

Package

Name
linux-gcp-5.3
Purl
pkg:deb/ubuntu/linux-gcp-5.3@5.3.0-1032.34~18.04.1?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.3.0-1008.9~18.04.1
5.3.0-1009.10~18.04.1
5.3.0-1010.11~18.04.1
5.3.0-1012.13~18.04.1
5.3.0-1014.15~18.04.1
5.3.0-1016.17~18.04.1
5.3.0-1017.18~18.04.1
5.3.0-1018.19~18.04.1
5.3.0-1020.22~18.04.1
5.3.0-1026.28~18.04.1
5.3.0-1029.31~18.04.1
5.3.0-1030.32~18.04.1
5.3.0-1032.34~18.04.1

Ubuntu:Pro:18.04:LTS / linux-gke-4.15

Package

Name
linux-gke-4.15
Purl
pkg:deb/ubuntu/linux-gke-4.15@4.15.0-1079.84?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.15.0-1030.32
4.15.0-1032.34
4.15.0-1033.35
4.15.0-1034.36
4.15.0-1036.38
4.15.0-1037.39
4.15.0-1040.42
4.15.0-1041.43
4.15.0-1042.44
4.15.0-1044.46
4.15.0-1045.48
4.15.0-1046.49
4.15.0-1048.51
4.15.0-1049.52
4.15.0-1050.53
4.15.0-1052.55
4.15.0-1055.58
4.15.0-1057.60
4.15.0-1058.61
4.15.0-1059.62
4.15.0-1063.66
4.15.0-1064.67
4.15.0-1066.69
4.15.0-1067.70
4.15.0-1069.72
4.15.0-1070.73
4.15.0-1072.76
4.15.0-1073.78
4.15.0-1074.79
4.15.0-1076.81
4.15.0-1077.82
4.15.0-1078.83
4.15.0-1079.84

Ubuntu:Pro:18.04:LTS / linux-hwe

Package

Name
linux-hwe
Purl
pkg:deb/ubuntu/linux-hwe@5.3.0-76.72?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.18.0-13.14~18.04.1
4.18.0-14.15~18.04.1
4.18.0-15.16~18.04.1
4.18.0-16.17~18.04.1
4.18.0-17.18~18.04.1
4.18.0-18.19~18.04.1
4.18.0-20.21~18.04.1
4.18.0-21.22~18.04.1
4.18.0-22.23~18.04.1
4.18.0-24.25~18.04.1
4.18.0-25.26~18.04.1

5.*

5.0.0-23.24~18.04.1
5.0.0-25.26~18.04.1
5.0.0-27.28~18.04.1
5.0.0-29.31~18.04.1
5.0.0-31.33~18.04.1
5.0.0-32.34~18.04.2
5.0.0-35.38~18.04.1
5.0.0-36.39~18.04.1
5.0.0-37.40~18.04.1
5.3.0-26.28~18.04.1
5.3.0-28.30~18.04.1
5.3.0-40.32~18.04.1
5.3.0-42.34~18.04.1
5.3.0-45.37~18.04.1
5.3.0-46.38~18.04.1
5.3.0-51.44~18.04.2
5.3.0-53.47~18.04.1
5.3.0-59.53~18.04.1
5.3.0-61.55~18.04.1
5.3.0-62.56~18.04.1
5.3.0-64.58~18.04.1
5.3.0-65.59
5.3.0-66.60
5.3.0-67.61
5.3.0-68.63
5.3.0-69.65
5.3.0-70.66
5.3.0-72.68
5.3.0-73.69
5.3.0-74.70
5.3.0-75.71
5.3.0-76.72

Ubuntu:Pro:18.04:LTS / linux-hwe-edge

Package

Name
linux-hwe-edge
Purl
pkg:deb/ubuntu/linux-hwe-edge@5.3.0-24.26~18.04.2?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.0.0-15.16~18.04.1
5.0.0-16.17~18.04.1
5.0.0-17.18~18.04.1
5.0.0-19.20~18.04.1
5.0.0-20.21~18.04.1
5.3.0-19.20~18.04.2
5.3.0-22.24~18.04.1
5.3.0-23.25~18.04.1
5.3.0-23.25~18.04.2
5.3.0-24.26~18.04.2

Ubuntu:Pro:18.04:LTS / linux-oem

Package

Name
linux-oem
Purl
pkg:deb/ubuntu/linux-oem@4.15.0-1103.114?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.15.0-1002.3
4.15.0-1004.5
4.15.0-1006.9
4.15.0-1008.11
4.15.0-1009.12
4.15.0-1012.15
4.15.0-1013.16
4.15.0-1015.18
4.15.0-1017.20
4.15.0-1018.21
4.15.0-1021.24
4.15.0-1024.29
4.15.0-1026.31
4.15.0-1028.33
4.15.0-1030.35
4.15.0-1033.38
4.15.0-1034.39
4.15.0-1035.40
4.15.0-1036.41
4.15.0-1038.43
4.15.0-1039.44
4.15.0-1043.48
4.15.0-1045.50
4.15.0-1050.57
4.15.0-1056.65
4.15.0-1057.66
4.15.0-1059.68
4.15.0-1063.72
4.15.0-1064.73
4.15.0-1065.75
4.15.0-1066.76
4.15.0-1067.77
4.15.0-1069.79
4.15.0-1073.83
4.15.0-1076.86
4.15.0-1079.89
4.15.0-1080.90
4.15.0-1081.91
4.15.0-1087.97
4.15.0-1090.100
4.15.0-1091.101
4.15.0-1093.103
4.15.0-1094.104
4.15.0-1096.106
4.15.0-1097.107
4.15.0-1099.109
4.15.0-1100.110
4.15.0-1101.112
4.15.0-1102.113
4.15.0-1103.114

Ubuntu:Pro:18.04:LTS / linux-oracle-5.0

Package

Name
linux-oracle-5.0
Purl
pkg:deb/ubuntu/linux-oracle-5.0@5.0.0-1014.19?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.0.0-1007.12~18.04.1
5.0.0-1008.13~18.04.1
5.0.0-1009.14~18.04.1
5.0.0-1010.15~18.04.1
5.0.0-1011.16
5.0.0-1013.18
5.0.0-1014.19

Ubuntu:Pro:18.04:LTS / linux-oracle-5.3

Package

Name
linux-oracle-5.3
Purl
pkg:deb/ubuntu/linux-oracle-5.3@5.3.0-1030.32~18.04.1?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.3.0-1011.12~18.04.1
5.3.0-1013.14~18.04.1
5.3.0-1014.15~18.04.1
5.3.0-1016.18~18.04.1
5.3.0-1018.20~18.04.1
5.3.0-1024.26~18.04.1
5.3.0-1027.29~18.04.1
5.3.0-1028.30~18.04.1
5.3.0-1030.32~18.04.1

Ubuntu:Pro:20.04:LTS / linux-aws-5.8

Package

Name
linux-aws-5.8
Purl
pkg:deb/ubuntu/linux-aws-5.8@5.8.0-1042.44~20.04.1?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.8.0-1035.37~20.04.1
5.8.0-1038.40~20.04.1
5.8.0-1041.43~20.04.1
5.8.0-1042.44~20.04.1

Ubuntu:Pro:20.04:LTS / linux-azure-5.8

Package

Name
linux-azure-5.8
Purl
pkg:deb/ubuntu/linux-azure-5.8@5.8.0-1043.46~20.04.1?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.8.0-1033.35~20.04.1
5.8.0-1036.38~20.04.1
5.8.0-1039.42~20.04.1
5.8.0-1040.43~20.04.1
5.8.0-1041.44~20.04.1
5.8.0-1042.45~20.04.1
5.8.0-1043.46~20.04.1

Ubuntu:Pro:20.04:LTS / linux-gcp-5.8

Package

Name
linux-gcp-5.8
Purl
pkg:deb/ubuntu/linux-gcp-5.8@5.8.0-1039.41?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.8.0-1032.34~20.04.1
5.8.0-1035.37~20.04.1
5.8.0-1038.40~20.04.1
5.8.0-1039.41

Ubuntu:Pro:20.04:LTS / linux-hwe-5.11

Package

Name
linux-hwe-5.11
Purl
pkg:deb/ubuntu/linux-hwe-5.11@5.11.0-46.51~20.04.1?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.11.0-22.23~20.04.1
5.11.0-25.27~20.04.1
5.11.0-27.29~20.04.1
5.11.0-34.36~20.04.1
5.11.0-36.40~20.04.1
5.11.0-37.41~20.04.2
5.11.0-38.42~20.04.1
5.11.0-40.44~20.04.2
5.11.0-41.45~20.04.1
5.11.0-43.47~20.04.2
5.11.0-44.48~20.04.2
5.11.0-46.51~20.04.1

Ubuntu:Pro:20.04:LTS / linux-hwe-5.8

Package

Name
linux-hwe-5.8
Purl
pkg:deb/ubuntu/linux-hwe-5.8@5.8.0-63.71~20.04.1?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.8.0-23.24~20.04.1
5.8.0-25.26~20.04.1
5.8.0-28.30~20.04.1
5.8.0-29.31~20.04.1
5.8.0-31.33~20.04.1
5.8.0-33.36~20.04.1
5.8.0-34.37~20.04.2
5.8.0-36.40~20.04.1
5.8.0-38.43~20.04.1
5.8.0-40.45~20.04.1
5.8.0-41.46~20.04.1
5.8.0-43.49~20.04.1
5.8.0-44.50~20.04.1
5.8.0-45.51~20.04.1
5.8.0-48.54~20.04.1
5.8.0-49.55~20.04.1
5.8.0-50.56~20.04.1
5.8.0-53.60~20.04.1
5.8.0-55.62~20.04.1
5.8.0-59.66~20.04.1
5.8.0-63.71~20.04.1

Ubuntu:Pro:20.04:LTS / linux-intel-5.13

Package

Name
linux-intel-5.13
Purl
pkg:deb/ubuntu/linux-intel-5.13@5.13.0-1017.19?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.13.0-1007.7
5.13.0-1008.8
5.13.0-1009.9
5.13.0-1010.10
5.13.0-1011.11
5.13.0-1014.15
5.13.0-1017.19

Ubuntu:Pro:20.04:LTS / linux-oem-5.6

Package

Name
linux-oem-5.6
Purl
pkg:deb/ubuntu/linux-oem-5.6@5.6.0-1056.60?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.6.0-1007.7
5.6.0-1008.8
5.6.0-1010.10
5.6.0-1011.11
5.6.0-1013.13
5.6.0-1017.17
5.6.0-1018.18
5.6.0-1020.20
5.6.0-1021.21
5.6.0-1023.23
5.6.0-1026.26
5.6.0-1027.27
5.6.0-1028.28
5.6.0-1031.32
5.6.0-1032.33
5.6.0-1033.35
5.6.0-1034.36
5.6.0-1035.37
5.6.0-1036.39
5.6.0-1039.43
5.6.0-1042.46
5.6.0-1047.51
5.6.0-1048.52
5.6.0-1050.54
5.6.0-1052.56
5.6.0-1053.57
5.6.0-1054.58
5.6.0-1055.59
5.6.0-1056.60

Ubuntu:Pro:20.04:LTS / linux-oracle-5.8

Package

Name
linux-oracle-5.8
Purl
pkg:deb/ubuntu/linux-oracle-5.8@5.8.0-1038.39~20.04.1?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.8.0-1031.32~20.04.2
5.8.0-1033.34~20.04.1
5.8.0-1034.35~20.04.2
5.8.0-1037.38~20.04.1
5.8.0-1038.39~20.04.1

Ubuntu:Pro:20.04:LTS / linux-raspi2

Package

Name
linux-raspi2
Purl
pkg:deb/ubuntu/linux-raspi2@5.4.0-1006.6?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.3.0-1007.8
5.3.0-1014.16
5.3.0-1015.17
5.3.0-1017.19
5.4.0-1004.4
5.4.0-1006.6

Ubuntu:Pro:20.04:LTS / linux-riscv

Package

Name
linux-riscv
Purl
pkg:deb/ubuntu/linux-riscv@5.4.0-40.45?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.4.0-24.28
5.4.0-26.30
5.4.0-27.31
5.4.0-28.32
5.4.0-30.34
5.4.0-31.35
5.4.0-33.37
5.4.0-34.38
5.4.0-36.41
5.4.0-37.42
5.4.0-39.44
5.4.0-40.45

Ubuntu:Pro:20.04:LTS / linux-riscv-5.8

Package

Name
linux-riscv-5.8
Purl
pkg:deb/ubuntu/linux-riscv-5.8@5.8.0-29.31~20.04.1?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.8.0-14.16~20.04.1
5.8.0-14.16~20.04.3
5.8.0-16.18~20.04.1
5.8.0-17.19~20.04.1
5.8.0-18.20~20.04.1
5.8.0-20.22~20.04.1
5.8.0-22.24~20.04.1
5.8.0-25.27~20.04.1
5.8.0-26.28~20.04.1
5.8.0-29.31~20.04.1