Information disclosure in ruby-mysql

1) Externally Controlled Reference to a Resource in Another Sphere

EUVDB-ID: #VU67809

Risk: Low

CVSSv3.1: 3 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3779

CWE-ID: CWE-610 - Externally Controlled Reference to a Resource in Another Sphere

Exploit availability: No

Description

The vulnerability allows a remote attacker to obtain sensitive information.

The vulnerability exists due to missing authorization when working with local files on the system with installed ruby-mysql client. A malicious MySQL server can request content of an arbitrary local file on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ruby-mysql: 2.9.5 - 2.9.14

External links

http://www.rapid7.com/blog/post/2022/06/28/cve-2021-3779-ruby-mysql-gem-client-file-read-fixed/

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.