#VU33321 Permissions, Privileges, and Access Controls in Ruby - CVE-2012-4466

Vulnerability identifier: #VU33321

Vulnerability risk: Medium

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

CVE-ID: CVE-2012-4466

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Ruby
Universal components / Libraries / Scripting languages

Vendor: Ruby

Description

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

Ruby 1.8.7 before patchlevel 371, 1.9.3 before patchlevel 286, and 2.0 before revision r37068 allows context-dependent attackers to bypass safe-level restrictions and modify untainted strings via the name_err_mesg_to_str API function, which marks the string as tainted, a different vulnerability than CVE-2011-1005.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Ruby: 1.8.7

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External links
https://lists.fedoraproject.org/pipermail/package-announce/2012-October/089554.html
https://lists.fedoraproject.org/pipermail/package-announce/2012-October/089887.html
https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=37068
https://www.mandriva.com/security/advisories?name=MDVSA-2013:124
https://www.openwall.com/lists/oss-security/2012/10/02/4
https://www.openwall.com/lists/oss-security/2012/10/03/9
https://www.ruby-lang.org/en/news/2012/10/12/cve-2012-4464-cve-2012-4466/
https://bugzilla.redhat.com/show_bug.cgi?id=862614
https://wiki.mageia.org/en/Support/Advisories/MGASA-2012-0294

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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.