#VU47646 Path traversal in Singularity - CVE-2020-15229

Vulnerability identifier: #VU47646

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-15229

CWE-ID: CWE-22

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 perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences within "unsquashfs". A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Singularity: 3.1.1 - 3.6.3

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External links
https://github.com/hpcng/singularity/security/advisories/GHSA-7gcp-w6ww-2xv9

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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.