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CVE-2021-4120

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

Published: Feb 17, 2022Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-20
8.2HIGH
NVD MITRE
EPSS Score
0.4%
Top 64.3%
CISA KEV
Not in KEV
Exploits
2 Known
Remediation
Patch Available
Self-Check
OpenVAS

Description

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

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:RS:CC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-20

Affected Products

Canonical Ltd.
commercial·GBaka canonical
snapdOn-prem
Operating Systems / linux-distro
ubuntu linuxOn-premOS
Operating Systems / linux-distro
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
fedoraproject
oss-project·USaka fedora project
fedoraOn-premOS
Operating Systems / linux-distro
and 1 more affected products View all →

Exploitability

2 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://redos.red-soft.ru/support/secure/
redos.red-soft.ru
https://nvd.nist.gov/vuln/detail/CVE-2021-4120
nvd.nist.gov
https://www.openwall.com/lists/oss-security/2022/02/18/2
openwall.com
and 5 more references View all →

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