Vulnerability CVE-2015-3649
Published: 2017-08-18

Description:
The open-uri-cached rubygem allows local users to execute arbitrary Ruby code by creating a directory under /tmp containing "openuri-" followed by a crafted UID, and putting Ruby code in said directory once a meta file is created.

CVSS2 => (AV:L/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.6/10
6.4/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Open-uri-cached project -> Open-uri-cached 

 References:
http://www.benjaminfleischer.com/2013/03/20/yaml-and-security-in-ruby/
http://www.openwall.com/lists/oss-security/2015/05/06/2
http://www.securityfocus.com/bid/74469
https://github.com/tigris/open-uri-cached/blob/master/lib/open-uri/cached.rb#L115
https://github.com/tigris/open-uri-cached/blob/master/lib/open-uri/cached.rb#L25
https://github.com/tigris/open-uri-cached/blob/master/lib/open-uri/cached.rb#L39
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