CVE-2020-1726
First published: Mon Feb 10 2020(Updated: )
A flaw was discovered in Podman where it incorrectly allows containers when created to overwrite existing files in volumes, even if they are mounted as read-only. When a user runs a malicious container or a container based on a malicious image with an attached volume that is used for the first time, it is possible to trigger the flaw and overwrite files in the volume.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/podman | <0:1.6.4-7.el8 | 0:1.6.4-7.el8 |
| Libpod Project Libpod | =1.6.0 | |
| Redhat Openshift Container Platform | =4.3 | |
| Redhat Enterprise Linux | =8.0 |
Remedy
If a volume needs to be attached as read-only to an untrusted container or container image, first attach it to a trusted container. Using the volume for the first time will make the attack impossible for other containers that are going to use the volume.
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00097.html
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00103.html
- https://access.redhat.com/errata/RHSA-2020:0680
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1726
- https://github.com/containers/libpod/commit/997c4b56ed2121726e966afe9a102ed16ba78f93
- https://github.com/containers/libpod/pull/5168
- https://github.com/containers/libpod/commit/c140ecdc9b416ab4efd4d21d14acd63b6adbdd42
- https://access.redhat.com/security/cve/cve-2020-1726
- https://access.redhat.com/errata/RHSA-2020:1650
- https://bugzilla.redhat.com/show_bug.cgi?id=1801152
- https://www.cve.org/CVERecord?id=CVE-2020-1726 https://nvd.nist.gov/vuln/detail/CVE-2020-1726
Frequently Asked Questions
What is CVE-2020-1726?
CVE-2020-1726 is a vulnerability discovered in Podman that allows containers to overwrite existing files in volumes, even if they are mounted as read-only.
What is the severity of CVE-2020-1726?
CVE-2020-1726 has a severity rating of medium with a CVSS score of 5.9.
How does CVE-2020-1726 affect Podman?
CVE-2020-1726 affects Podman by allowing containers to overwrite existing files in volumes.
How can I fix CVE-2020-1726?
To fix CVE-2020-1726, update Podman to version 1.6.4-7.el8 or later.
Are there any references for CVE-2020-1726?
You can find more information about CVE-2020-1726 at the following references: [link1], [link2], [link3].
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