Incorrect default permissions in singularity (Alpine package)



Published: 2019-12-17
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-19724
CWE-ID CWE-276
Exploitation vector Local
Public exploit N/A
Vulnerable software
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singularity (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Incorrect default permissions

EUVDB-ID: #VU31793

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-19724

CWE-ID: CWE-276 - Incorrect Default Permissions

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to insecure permissions for files and folders that are set by the application on $HOME/.singularity file when it is newly created by Singularity. A local user with access to the system can view contents of files and directories or modify them.

Mitigation

Install update from vendor's website.

Vulnerable software versions

singularity (Alpine package): 3.5.1-r0

External links

http://git.alpinelinux.org/aports/commit/?id=ce8c16e040997439ea13b6549e49da928b42c557
http://git.alpinelinux.org/aports/commit/?id=9fbb9f651ef410a8157fd6f20533ebba5b70f528


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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