CVE-2023-30549
Summary
| CVE | CVE-2023-30549 |
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| State | PUBLIC |
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| Assigner | [email protected] |
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| Source Priority | CVE Program / NVD first with legacy fallback |
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| Published | 2023-04-25 21:15:00 UTC |
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| Updated | 2023-11-25 12:15:00 UTC |
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| 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. |
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NVD Known Affected Configurations (CPE 2.3)
References
| Reference | Source | Link | Tags |
|---|
| Apptainer: Privilege Escalation (GLSA 202311-13) — Gentoo security |
|
security.gentoo.org |
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| Linux 4.19.283 [LWN.net] |
MISC |
lwn.net |
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| Release Apptainer 1.1.8 · apptainer/apptainer · GitHub |
MISC |
github.com |
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| Response to CVE-2023-30549 | Sylabs |
MISC |
sylabs.io |
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| ext4: avoid a potential slab-out-of-bounds in ext4_group_desc_csum · torvalds/linux@4f04351 · GitHub |
MISC |
github.com |
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| An unpatched ext4 vulnerability is exploitable through setuid-mode Apptainer and Singularity · Advisory · apptainer/apptainer · GitHub |
MISC |
github.com |
|
| Merge pull request from GHSA-j4rf-7357-f4cg · apptainer/apptainer@5a4964f · GitHub |
MISC |
github.com |
|
| CVE-2022-1184 | SUSE |
MISC |
www.suse.com |
|
| CVE-2022-1184 |
MISC |
security-tracker.debian.org |
|
| Linux 5.4.243 [LWN.net] |
MISC |
lwn.net |
|
| ext4: add bounds checking in get_max_inline_xattr_value_size() · torvalds/linux@2220eaf · GitHub |
MISC |
github.com |
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| CVE-2022-1184 | Ubuntu |
MISC |
ubuntu.com |
|
| Red Hat Customer Portal - Access to 24x7 support and knowledge |
MISC |
access.redhat.com |
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| CVE Program record |
CVE.ORG |
www.cve.org |
canonical |
| NVD vulnerability detail |
NVD |
nvd.nist.gov |
canonical, analysis |
No vendor comments have been submitted for this CVE.
Legacy QID Mappings
- 505984 Alpine Linux Security Update for apptainer
- 710792 Gentoo Linux Apptainer Privilege Escalation Vulnerability (GLSA 202311-13)
