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Vulnerability Details :

CVE-2020-11933

Summary
Assigner-canonical
Assigner Org ID-cc1ad9ee-3454-478d-9317-d3e869d708bc
Published At-29 Jul, 2020 | 16:25
Updated At-17 Sep, 2024 | 00:40
Rejected At-
Credits

local snapd exploit through cloud-init

cloud-init as managed by snapd on Ubuntu Core 16 and Ubuntu Core 18 devices was run without restrictions on every boot, which a physical attacker could exploit by crafting cloud-init user-data/meta-data via external media to perform arbitrary changes on the device to bypass intended security mechanisms such as full disk encryption. This issue did not affect traditional Ubuntu systems. Fixed in snapd version 2.45.2, revision 8539 and core version 2.45.2, revision 9659.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:canonical
Assigner Org ID:cc1ad9ee-3454-478d-9317-d3e869d708bc
Published At:29 Jul, 2020 | 16:25
Updated At:17 Sep, 2024 | 00:40
Rejected At:
▼CVE Numbering Authority (CNA)
local snapd exploit through cloud-init

cloud-init as managed by snapd on Ubuntu Core 16 and Ubuntu Core 18 devices was run without restrictions on every boot, which a physical attacker could exploit by crafting cloud-init user-data/meta-data via external media to perform arbitrary changes on the device to bypass intended security mechanisms such as full disk encryption. This issue did not affect traditional Ubuntu systems. Fixed in snapd version 2.45.2, revision 8539 and core version 2.45.2, revision 9659.

Affected Products
Vendor
Canonical Ltd.Canonical
Product
snapd
Versions
Affected
  • From 2.45.2 before 2.45.2, revision 8539 (custom)
Vendor
Canonical Ltd.Canonical
Product
core
Versions
Affected
  • From 2.45.2 before 2.45.2, revision 9659 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-264CWE-264 Permissions, Privileges, and Access Controls
Type: CWE
CWE ID: CWE-264
Description: CWE-264 Permissions, Privileges, and Access Controls
Metrics
VersionBase scoreBase severityVector
3.17.3HIGH
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Version: 3.1
Base score: 7.3
Base severity: HIGH
Vector:
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Ian Johnson
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://launchpad.net/bugs/1879530
x_refsource_CONFIRM
https://ubuntu.com/USN-4424-1
x_refsource_CONFIRM
Hyperlink: https://launchpad.net/bugs/1879530
Resource:
x_refsource_CONFIRM
Hyperlink: https://ubuntu.com/USN-4424-1
Resource:
x_refsource_CONFIRM
▼Authorized Data Publishers (ADP)
CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://launchpad.net/bugs/1879530
x_refsource_CONFIRM
x_transferred
https://ubuntu.com/USN-4424-1
x_refsource_CONFIRM
x_transferred
Hyperlink: https://launchpad.net/bugs/1879530
Resource:
x_refsource_CONFIRM
x_transferred
Hyperlink: https://ubuntu.com/USN-4424-1
Resource:
x_refsource_CONFIRM
x_transferred
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security@ubuntu.com
Published At:29 Jul, 2020 | 17:15
Updated At:04 Nov, 2021 | 17:45

cloud-init as managed by snapd on Ubuntu Core 16 and Ubuntu Core 18 devices was run without restrictions on every boot, which a physical attacker could exploit by crafting cloud-init user-data/meta-data via external media to perform arbitrary changes on the device to bypass intended security mechanisms such as full disk encryption. This issue did not affect traditional Ubuntu systems. Fixed in snapd version 2.45.2, revision 8539 and core version 2.45.2, revision 9659.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.16.8MEDIUM
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Secondary3.17.3HIGH
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Primary2.04.6MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P
Type: Primary
Version: 3.1
Base score: 6.8
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Type: Secondary
Version: 3.1
Base score: 7.3
Base severity: HIGH
Vector:
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Type: Primary
Version: 2.0
Base score: 4.6
Base severity: MEDIUM
Vector:
AV:L/AC:L/Au:N/C:P/I:P/A:P
CPE Matches

Canonical Ltd.
canonical
>>snapd>>Versions before 2.45.2(exclusive)
cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:*
Canonical Ltd.
canonical
>>ubuntu_linux>>16.04
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
Canonical Ltd.
canonical
>>ubuntu_linux>>18.04
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
Canonical Ltd.
canonical
>>ubuntu_linux>>19.10
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
Canonical Ltd.
canonical
>>ubuntu_linux>>20.04
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
Weaknesses
CWE IDTypeSource
NVD-CWE-OtherPrimarynvd@nist.gov
CWE-264Secondarysecurity@ubuntu.com
CWE ID: NVD-CWE-Other
Type: Primary
Source: nvd@nist.gov
CWE ID: CWE-264
Type: Secondary
Source: security@ubuntu.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://launchpad.net/bugs/1879530security@ubuntu.com
Third Party Advisory
https://ubuntu.com/USN-4424-1security@ubuntu.com
Vendor Advisory
Hyperlink: https://launchpad.net/bugs/1879530
Source: security@ubuntu.com
Resource:
Third Party Advisory
Hyperlink: https://ubuntu.com/USN-4424-1
Source: security@ubuntu.com
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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