#VU20190 Cross-site scripting in RubyGems - CVE-2019-8325

Vulnerability identifier: #VU20190

Vulnerability risk: Low

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

CVE-ID: CVE-2019-8325

CWE-ID: CWE-79

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 XSS attacks.

The vulnerability exists due to improper input validation when processing alerts in the Gem::CommandManager#run. A remote attacker can inject and execute arbitrary HTML or JavaScript code.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

RubyGems: 2.6.0 - 3.0.1

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External links
https://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
https://hackerone.com/reports/317353

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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.