Medium severity · published Feb 17, 2022
CVE-2021-3155
snapd 2.54.2 and earlier created ~/snap directories in user home directories without specifying owner-only permissions
5.5
CVSS
0.3%
EPSS
No
On KEV
Description
snapd 2.54.2 and earlier created ~/snap directories in user home directories without specifying owner-only permissions. This could allow a local attacker to read information that should have been private. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 18% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SN
Snapd · Canonical
before 2.54.3 · source: NVD
UL
Ubuntu Linux · Canonical
18.04; 20.04; 21.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3155
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3155
Patch
https://github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85
Patch
https://github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dcca
Patch
https://ubuntu.com/security/notices/USN-5292-1
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