CVE-2021-4120

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-4120
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

8.2 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.5 / Impact : 6.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

4.6 /10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:L/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 3.9 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

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

Configuration 1 (hide)

cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*

Configuration 3 (hide)

OR cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
History

21 Nov 2024, 06:36

Type Values Removed Values Added
CVSS v2 : 4.6
v3 : 7.8 		v2 : 4.6
v3 : 8.2
References () http://www.openwall.com/lists/oss-security/2022/02/18/2 - Exploit, Mailing List, Third Party Advisory () http://www.openwall.com/lists/oss-security/2022/02/18/2 - Exploit, Mailing List, Third Party Advisory
References () https://bugs.launchpad.net/snapd/+bug/1949368 - Exploit, Issue Tracking, Third Party Advisory () https://bugs.launchpad.net/snapd/+bug/1949368 - Exploit, Issue Tracking, Third Party Advisory
References () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/ - () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/ -
References () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/ - () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/ -
References () https://ubuntu.com/security/notices/USN-5292-1 - Patch, Vendor Advisory () https://ubuntu.com/security/notices/USN-5292-1 - Patch, Vendor Advisory

01 Mar 2022, 17:07

Type Values Removed Values Added
CWE CWE-20
CPE cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*
cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : 4.6
v3 : 7.8
References (MISC) https://ubuntu.com/security/notices/USN-5292-1 - (MISC) https://ubuntu.com/security/notices/USN-5292-1 - Patch, Vendor Advisory
References (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/ - (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/ - Mailing List, Third Party Advisory
References (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/ - (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/ - Mailing List, Third Party Advisory
References (MLIST) http://www.openwall.com/lists/oss-security/2022/02/18/2 - (MLIST) http://www.openwall.com/lists/oss-security/2022/02/18/2 - Exploit, Mailing List, Third Party Advisory
References (MISC) https://bugs.launchpad.net/snapd/+bug/1949368 - (MISC) https://bugs.launchpad.net/snapd/+bug/1949368 - Exploit, Issue Tracking, Third Party Advisory

20 Feb 2022, 03:15

Type Values Removed Values Added
References
  • (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/ -
  • (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/ -

18 Feb 2022, 10:15

Type Values Removed Values Added
References
  • (MLIST) http://www.openwall.com/lists/oss-security/2022/02/18/2 -

17 Feb 2022, 23:15

Type Values Removed Values Added
New CVE
Information

Published : 2022-02-17 23:15

Updated : 2024-11-21 06:36

NVD link : CVE-2021-4120

Mitre link : CVE-2021-4120

CVE.ORG link : CVE-2021-4120

JSON object : View

Products Affected

canonical

  • snapd
  • ubuntu_linux

fedoraproject

  • fedora
CWE
CWE-20

Improper Input Validation