Multiple vulnerabilities in actionpack gem for Ruby

Published: 2020-05-26

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-8164 CVE-2020-8166
CWE-ID	CWE-200 CWE-352
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #2 is available.
Vulnerable software Subscribe	actionpack Web applications / Modules and components for CMS
Vendor	Ruby

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Information disclosure

EUVDB-ID: #VU28243

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8164

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in the return value of "each", or "each_value", or "each_pair" will return the underlying "untrusted" hash of data that was read from the parameters. A remote attacker can gain unauthorized access to sensitive information on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

actionpack: 5.0.0 - 6.0.3 rc1

External links

http://snyk.io/vuln/SNYK-RUBY-ACTIONPACK-569600
http://github.com/rails/rails/commit/b3230c500d780b5a5d500cc57496074e1d3d8ea9
http://groups.google.com/forum/#!topic/rubyonrails-security/f6ioe4sdpbY

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.

2) Cross-site request forgery

EUVDB-ID: #VU28244

Risk: Low

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-8166

CWE-ID: CWE-352 - Cross-Site Request Forgery (CSRF)