CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
26.0%
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.
Vendor | Product | Version | CPE |
---|---|---|---|
lfprojects | apptainer | * | cpe:2.3:a:lfprojects:apptainer:*:*:*:*:*:go:*:* |
sylabs | singularity | * | cpe:2.3:a:sylabs:singularity:*:*:*:*:*:*:*:* |
redhat | enterprise_linux | 7.0 | cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* |
[
{
"vendor": "apptainer",
"product": "apptainer",
"versions": [
{
"version": "< 1.1.8",
"status": "affected"
}
]
}
]
access.redhat.com/security/cve/cve-2022-1184
github.com/apptainer/apptainer/commit/5a4964f5ba9c8d89a0e353b97f51fd607670a9f7
github.com/apptainer/apptainer/releases/tag/v1.1.8
github.com/apptainer/apptainer/security/advisories/GHSA-j4rf-7357-f4cg
github.com/torvalds/linux/commit/2220eaf90992c11d888fe771055d4de3303
github.com/torvalds/linux/commit/4f04351888a83e595571de672e0a4a8b74f
lwn.net/Articles/932136/
lwn.net/Articles/932137/
security-tracker.debian.org/tracker/CVE-2022-1184
security.gentoo.org/glsa/202311-13
sylabs.io/2023/04/response-to-cve-2023-30549/
ubuntu.com/security/CVE-2022-1184
www.suse.com/security/cve/CVE-2022-1184.html