Input validation error in Ruby

1) Input validation error

EUVDB-ID: #VU39345

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

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

External links

http://seclists.org/oss-sec/2015/q3/222
http://www.securityfocus.com/bid/76060
http://access.redhat.com/errata/RHSA-2018:0583
http://bugzilla.redhat.com/show_bug.cgi?id=1248935
http://github.com/ruby/ruby/commit/4600cf725a86ce31266153647ae5aa1197b1215b
http://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.