Incorrect default permissions in Singularity - CVE-2020-25039
Published: September 16, 2020 / Updated: September 25, 2020
Vulnerability identifier: #VU47113
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-25039
CWE-ID: CWE-276
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to incorrect default permissions on temporary directories used in fakeroot or user namespace container execution. A local user with access to the system can view contents of files and directories or modify them.
Affected software
Singularity
singularity (Alpine package)
SUSE Linux
Opensuse
singularity (Alpine package)
SUSE Linux
Opensuse
How to mitigate CVE-2020-25039
Install updates from vendor's website.
Singularity - update to 3.6.3
singularity (Alpine package) - update to 3.6.3-r0
singularity (Alpine package) - update to 3.6.3-r0