Input validation error in Ruby

1) Input validation error

EUVDB-ID: #VU39345

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2009-5147

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

DL::dlopen in Ruby 1.8, 1.9.0, 1.9.2, 1.9.3, 2.0.0 before patchlevel 648, and 2.1 before 2.1.8 opens libraries with tainted names.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Ruby: 1.8.0 - 2.1.7

CPE2.3

• cpe:2.3:a:ruby:ruby:1.8.0:*:*:*:*:*:*:*
• cpe:2.3:a:ruby:ruby:1.9.0:*:*:*:*:*:*:*
• cpe:2.3:a:ruby:ruby:1.9.2:*:*:*:*:*:*:*

External links

https://seclists.org/oss-sec/2015/q3/222
https://www.securityfocus.com/bid/76060
https://access.redhat.com/errata/RHSA-2018:0583
https://bugzilla.redhat.com/show_bug.cgi?id=1248935
https://github.com/ruby/ruby/commit/4600cf725a86ce31266153647ae5aa1197b1215b
https://www.ruby-lang.org/en/news/2015/12/16/unsafe-tainted-string-usage-in-fiddle-and-dl-cve-2015-7551/

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.