CVE-2021-3155: snapd created ~/snap with too-wide permissions
First published: Thu Feb 17 2022(Updated: )
Last updated 24 July 2024
Credit: security@ubuntu.com security@ubuntu.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Canonical snapd | <2.54.3 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =20.04 | |
| Canonical Ubuntu Linux | =21.10 | |
| debian/snapd | <=2.49-1+deb11u2 | 2.57.6-1 2.65.3-1 2.66.1-1 |
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Reference Links
- https://github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85
- https://github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dcca
- https://ubuntu.com/security/notices/USN-5292-1
- https://launchpad.net/bugs/cve/CVE-2021-3155
- https://github.com/snapcore/snapd/pull/9841
- https://security-tracker.debian.org/tracker/CVE-2021-3155
- https://www.cve.org/CVERecord?id=CVE-2021-3155
- https://nvd.nist.gov/vuln/detail/CVE-2021-3155
- https://ubuntu.com/security/CVE-2021-3155
Frequently Asked Questions
What is CVE-2021-3155?
CVE-2021-3155 is a vulnerability in snapd 2.54.2 and earlier that allowed a local attacker to read information that should have been private.
How severe is CVE-2021-3155?
CVE-2021-3155 has a severity score of 5.5, which is considered medium.
Which versions of snapd are affected by CVE-2021-3155?
snapd versions 2.54.2 and earlier are affected by CVE-2021-3155.
How can I fix CVE-2021-3155?
To fix CVE-2021-3155, update snapd to versions 2.54.3+18.04, 2.54.3+20.04, or 2.54.3+21.10.1.
Where can I find more information about CVE-2021-3155?
You can find more information about CVE-2021-3155 in the following references: [Link 1](https://github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85), [Link 2](https://github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dcca), [Link 3](https://ubuntu.com/security/notices/USN-5292-1).
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