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Vulnerability Details :

CVE-2021-4120

Summary
Assigner-canonical
Assigner Org ID-cc1ad9ee-3454-478d-9317-d3e869d708bc
Published At-17 Feb, 2022 | 22:15
Updated At-03 Aug, 2024 | 17:16
Rejected At-
Credits

snapd could be made to bypass intended access restrictions through snap content interfaces and layout paths

snapd 2.54.2 fails to perform sufficient validation of snap content interface and layout paths, resulting in the ability for snaps to inject arbitrary AppArmor policy rules via malformed content interface and layout declarations and hence escape strict snap confinement. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1

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:17 Feb, 2022 | 22:15
Updated At:03 Aug, 2024 | 17:16
Rejected At:
▼CVE Numbering Authority (CNA)
snapd could be made to bypass intended access restrictions through snap content interfaces and layout paths

snapd 2.54.2 fails to perform sufficient validation of snap content interface and layout paths, resulting in the ability for snaps to inject arbitrary AppArmor policy rules via malformed content interface and layout declarations and hence escape strict snap confinement. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1

Affected Products
Vendor
Canonical Ltd.Canonical Ltd.
Product
snapd
Versions
Affected
  • From unspecified through 2.54.2 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-20CWE-20 Improper Input Validation
Type: CWE
CWE ID: CWE-20
Description: CWE-20 Improper Input Validation
Metrics
VersionBase scoreBase severityVector
3.18.2HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Version: 3.1
Base score: 8.2
Base severity: HIGH
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Ian Johnson
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://ubuntu.com/security/notices/USN-5292-1
x_refsource_MISC
https://bugs.launchpad.net/snapd/+bug/1949368
x_refsource_MISC
http://www.openwall.com/lists/oss-security/2022/02/18/2
mailing-list
x_refsource_MLIST
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/
vendor-advisory
x_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/
vendor-advisory
x_refsource_FEDORA
Hyperlink: https://ubuntu.com/security/notices/USN-5292-1
Resource:
x_refsource_MISC
Hyperlink: https://bugs.launchpad.net/snapd/+bug/1949368
Resource:
x_refsource_MISC
Hyperlink: http://www.openwall.com/lists/oss-security/2022/02/18/2
Resource:
mailing-list
x_refsource_MLIST
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/
Resource:
vendor-advisory
x_refsource_FEDORA
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/
Resource:
vendor-advisory
x_refsource_FEDORA
▼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://ubuntu.com/security/notices/USN-5292-1
x_refsource_MISC
x_transferred
https://bugs.launchpad.net/snapd/+bug/1949368
x_refsource_MISC
x_transferred
http://www.openwall.com/lists/oss-security/2022/02/18/2
mailing-list
x_refsource_MLIST
x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/
vendor-advisory
x_refsource_FEDORA
x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/
vendor-advisory
x_refsource_FEDORA
x_transferred
Hyperlink: https://ubuntu.com/security/notices/USN-5292-1
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://bugs.launchpad.net/snapd/+bug/1949368
Resource:
x_refsource_MISC
x_transferred
Hyperlink: http://www.openwall.com/lists/oss-security/2022/02/18/2
Resource:
mailing-list
x_refsource_MLIST
x_transferred
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/
Resource:
vendor-advisory
x_refsource_FEDORA
x_transferred
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/
Resource:
vendor-advisory
x_refsource_FEDORA
x_transferred
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security@ubuntu.com
Published At:17 Feb, 2022 | 23:15
Updated At:07 Nov, 2023 | 03:40

snapd 2.54.2 fails to perform sufficient validation of snap content interface and layout paths, resulting in the ability for snaps to inject arbitrary AppArmor policy rules via malformed content interface and layout declarations and hence escape strict snap confinement. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1

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
Primary3.17.8HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Secondary3.18.2HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Primary2.04.6MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P
Type: Primary
Version: 3.1
Base score: 7.8
Base severity: HIGH
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Type: Secondary
Version: 3.1
Base score: 8.2
Base severity: HIGH
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
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 up to 2.54.2(inclusive)
cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:*
Canonical Ltd.
canonical
>>ubuntu_linux>>18.04
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
Canonical Ltd.
canonical
>>ubuntu_linux>>20.04
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
Canonical Ltd.
canonical
>>ubuntu_linux>>21.10
cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*
Fedora Project
fedoraproject
>>fedora>>34
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Fedora Project
fedoraproject
>>fedora>>35
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-20Primarynvd@nist.gov
CWE-20Secondarysecurity@ubuntu.com
CWE ID: CWE-20
Type: Primary
Source: nvd@nist.gov
CWE ID: CWE-20
Type: Secondary
Source: security@ubuntu.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
http://www.openwall.com/lists/oss-security/2022/02/18/2security@ubuntu.com
Exploit
Mailing List
Third Party Advisory
https://bugs.launchpad.net/snapd/+bug/1949368security@ubuntu.com
Exploit
Issue Tracking
Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/security@ubuntu.com
N/A
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/security@ubuntu.com
N/A
https://ubuntu.com/security/notices/USN-5292-1security@ubuntu.com
Patch
Vendor Advisory
Hyperlink: http://www.openwall.com/lists/oss-security/2022/02/18/2
Source: security@ubuntu.com
Resource:
Exploit
Mailing List
Third Party Advisory
Hyperlink: https://bugs.launchpad.net/snapd/+bug/1949368
Source: security@ubuntu.com
Resource:
Exploit
Issue Tracking
Third Party Advisory
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/
Source: security@ubuntu.com
Resource: N/A
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/
Source: security@ubuntu.com
Resource: N/A
Hyperlink: https://ubuntu.com/security/notices/USN-5292-1
Source: security@ubuntu.com
Resource:
Patch
Vendor Advisory

Change History

0
Information is not available yet

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