Vulnerability in Canonical Ltd. Snapd
CVE-2021-3155
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
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.8 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (16.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 16.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Canonical Ltd. Snapd — versions unspecified
- Canonical Snapd
- Canonical Ubuntu Linux — versions 18.04, 20.04, 21.10
Weakness classification (CWE)
Public proof-of-concept exploits
References
- ubuntu.com/security/notices/USN-5292-1 (Patch, Vendor Advisory)
- github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85 (Patch, Third Party Advisory)
- github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dcca (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3155?
- CVE-2021-3155 is a low-severity vulnerability in Canonical Ltd. Snapd, classified under Incorrect Default Permissions. CVSS score: 3.8/10. Published 2022-02-17.
- How severe is CVE-2021-3155?
- Low severity. CVSS v3 base score is 3.8 out of 10.
- Is CVE-2021-3155 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.