Upstream information
Description
Apptainer is an open source container platform for Linux. There is an ext4 use-after-free flaw that is exploitable through versions of Apptainer < 1.1.0 and installations that include apptainer-suid < 1.1.8 on older operating systems where that CVE has not been patched. That includes Red Hat Enterprise Linux 7, Debian 10 buster (unless the linux-5.10 package is installed), Ubuntu 18.04 bionic and Ubuntu 20.04 focal. Use-after-free flaws in the kernel can be used to attack the kernel for denial of service and potentially for privilege escalation.Apptainer 1.1.8 includes a patch that by default disables mounting of extfs filesystem types in setuid-root mode, while continuing to allow mounting of extfs filesystems in non-setuid "rootless" mode using fuse2fs.
Some workarounds are possible. Either do not install apptainer-suid (for versions 1.1.0 through 1.1.7) or set `allow setuid = no` in apptainer.conf. This requires having unprivileged user namespaces enabled and except for apptainer 1.1.x versions will disallow mounting of sif files, extfs files, and squashfs files in addition to other, less significant impacts. (Encrypted sif files are also not supported unprivileged in apptainer 1.1.x.). Alternatively, use the `limit containers` options in apptainer.conf/singularity.conf to limit sif files to trusted users, groups, and/or paths, and set `allow container extfs = no` to disallow mounting of extfs overlay files. The latter option by itself does not disallow mounting of extfs overlay partitions inside SIF files, so that's why the former options are also needed.
SUSE information
Overall state of this security issue: Does not affect SUSE products
This issue is currently rated as having important severity.
| National Vulnerability Database | |
|---|---|
| Base Score | 7.8 |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Attack Vector | Local |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality Impact | High |
| Integrity Impact | High |
| Availability Impact | High |
| CVSSv3 Version | 3.1 |
SUSE Security Advisories:
- openSUSE-SU-2024:0244-1, published Fri Aug 16 10:49:03 2024
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| SUSE Package Hub 15 SP5 |
| Patchnames: openSUSE-2024-244 |
| openSUSE Leap 15.5 |
| Patchnames: openSUSE-2024-244 |
| openSUSE Tumbleweed |
| Patchnames: openSUSE-Tumbleweed-2024-12894 |
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 High Performance Computing 15 SP6 | apptainer | Already fixed |
| SUSE Linux Enterprise Module for HPC 15 SP6 | apptainer | Already fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | singularity | Analysis |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | singularity | Analysis |
| SUSE Package Hub 15 SP5 | apptainer | Released |
| SUSE Package Hub 15 SP5 | squashfuse | Released |
| openSUSE Leap 15.5 | singularity | Analysis |
| openSUSE Leap 15.6 | apptainer | Already fixed |
| openSUSE Leap 15.6 | singularity | Analysis |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Linux Enterprise Module for Package Hub 15 SP4 | singularity | Unsupported |
| openSUSE Leap 15.4 | singularity | Analysis |
SUSE Timeline for this CVE
CVE page created: Wed Apr 26 00:01:09 2023CVE page last modified: Wed Oct 9 19:48:13 2024