#VU13896 Race condition in Singularity - CVE-2018-12021

Vulnerability identifier: #VU13896

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-12021

CWE-ID: CWE-362

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Singularity
Universal components / Libraries / Libraries used by multiple products

Vendor: Singularity

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information.

The vulnerability exists due to race condition. A remote attacker can bypass directory image restrictions, like mounting the host root filesystem as a container image and gain access to arbitrary data.

Mitigation
Update to version 2.5.2.

Vulnerable software versions

Singularity: 2.3.0 - 2.5.1

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External links
https://github.com/singularityware/singularity/releases/tag/2.5.2

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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