Permissions, Privileges, and Access Controls in Singularity - CVE-2019-11328
Published: July 23, 2020
Vulnerability identifier: #VU31792
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-11328
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to escalate privileges on the system.
The vulnerability exists due to application does not properly impose security restrictions and allows authenticated users to edit files within the `/run/singularity/instances/sing//` directory. The manipulation of those files can change the behavior of the starter-suid program when instances are joined resulting in potential privilege escalation on the host.
Affected software
Singularity
Fedora
SUSE Linux
Opensuse
singularity
Fedora
SUSE Linux
Opensuse
singularity
How to mitigate CVE-2019-11328
Install updates from vendor's website.
Singularity - update to 3.2.0
singularity - addressed in versions 3.1.1-1.1.el6, 3.1.1-1.1.el7, 3.1.1-1.1.fc28, 3.1.1-1.1.fc29, 3.1.1-1.1.fc30
singularity - addressed in versions 3.1.1-1.1.el6, 3.1.1-1.1.el7, 3.1.1-1.1.fc28, 3.1.1-1.1.fc29, 3.1.1-1.1.fc30
External References
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00028.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00059.html
- http://www.openwall.com/lists/oss-security/2019/05/16/1
- http://www.securityfocus.com/bid/108360
- https://github.com/sylabs/singularity/releases/tag/v3.2.0
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5O3TPL5OOTIZEI4H6IQBCCISBARJ6WL3/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LIHV7DSEVTB5SUPEZ2UXGS3Q6WMEQSO2/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LNU5BUHFOTYUZVHFUSX2VG4S3RCPUEMA/