Upstream information
Description
Singularity (an open source container platform) from version 3.1.1 through 3.6.3 has a vulnerability. Due to insecure handling of path traversal and the lack of path sanitization within `unsquashfs`, it is possible to overwrite/create any files on the host filesystem during the extraction with a crafted squashfs filesystem. The extraction occurs automatically for unprivileged (either installation or with `allow setuid = no`) run of Singularity when a user attempt to run an image which is a local SIF image or a single file containing a squashfs filesystem and is coming from remote sources `library://` or `shub://`. Image build is also impacted in a more serious way as it can be used by a root user, allowing an attacker to overwrite/create files leading to a system compromise, so far bootstrap methods `library`, `shub` and `localimage` are triggering the squashfs extraction. This issue is addressed in Singularity 3.6.4. All users are advised to upgrade to 3.6.4 especially if they use Singularity mainly for building image as root user. There is no solid workaround except to temporary avoid to use unprivileged mode with single file images in favor of sandbox images instead. Regarding image build, temporary avoid to build from `library` and `shub` sources and as much as possible use `--fakeroot` or a VM for that.SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having critical severity.
| National Vulnerability Database | |
|---|---|
| Base Score | 5.8 |
| Vector | AV:N/AC:M/Au:N/C:P/I:P/A:N |
| Access Vector | Network |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | Partial |
| Integrity Impact | Partial |
| Availability Impact | None |
| National Vulnerability Database | |
|---|---|
| Base Score | 9.3 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | Required |
| Scope | Changed |
| Confidentiality Impact | High |
| Integrity Impact | High |
| Availability Impact | None |
| CVSSv3 Version | 3.1 |
SUSE Security Advisories:
- openSUSE-SU-2020:1769-1, published Thu Dec 7 12:55:41 2023
- openSUSE-SU-2020:1770-1, published Thu Dec 7 12:55:41 2023
- openSUSE-SU-2020:1814-1, published Thu Dec 7 12:55:41 2023
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| SUSE Package Hub 15 SP2 |
| Patchnames: openSUSE-2020-1814 |
| openSUSE Leap 15.1 |
| Patchnames: openSUSE-2020-1769 |
| openSUSE Leap 15.2 |
| Patchnames: openSUSE-2020-1770 |
| openSUSE Tumbleweed |
| Patchnames: openSUSE Tumbleweed GA singularity-3.8.3-1.2 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | singularity | Already fixed |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Linux Enterprise Module for Package Hub 15 SP4 | singularity | Already fixed |
| SUSE Package Hub 15 SP2 | singularity | Released |
SUSE Timeline for this CVE
CVE page created: Thu Oct 15 21:07:13 2020CVE page last modified: Fri Apr 12 11:46:00 2024