CVE-2021-3155

snapd created ~/snap with too-wide permissions

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

Category

3.8
CVSS
Severity: Low
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.03%
Vendor Advisory ubuntu.com
Affected: Canonical Ltd. snapd
Published at:
Updated at:

References

Link Tags
https://ubuntu.com/security/notices/USN-5292-1 patch vendor advisory
https://github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85 third party advisory patch
https://github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dcca third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-3155?
CVE-2021-3155 has been scored as a low severity vulnerability.
How to fix CVE-2021-3155?
To fix CVE-2021-3155, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-3155 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-3155 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3155?
CVE-2021-3155 affects Canonical Ltd. snapd.
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