#VU31792 Permissions, Privileges, and Access Controls in Singularity - CVE-2019-11328
Published: July 23, 2020
Vulnerability identifier: #VU31792
Vulnerability risk: Low
CVSSv4.0: 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/E:U/U:Clear
CVE-ID: CVE-2019-11328
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Singularity
Singularity
Software vendor:
Singularity
Singularity
Description
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.
Remediation
Install updates from vendor's website.
External links
- 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/