#VU20193 Path traversal in RubyGems - CVE-2019-8320

Vulnerability identifier: #VU20193

Vulnerability risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-8320

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

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

Vendor: Ruby

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 in gems. A remote attacker can trick the victim to load a specially crafted gem and delete arbitrary files on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

RubyGems: 2.7.6 - 3.0.1

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External links
https://access.redhat.com/errata/RHSA-2019:1429
https://blog.rubygems.org/2019/03/05/security-advisories-2019-03.html
https://hackerone.com/reports/317321

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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.