UBUNTU-CVE-2017-17405

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UBUNTU-CVE-2017-17405

Summary:

Details: Ruby before 2.4.3 allows Net::FTP command injection. Net::FTP#get, getbinaryfile, gettextfile, put, putbinaryfile, and puttextfile use Kernel#open to open a local file. If the localfile argument starts with the "|" pipe character, the command following the pipe character is executed. The default value of localfile is File.basename(remotefile), so malicious FTP servers could cause arbitrary command execution.

References: https://ubuntu.com/security/CVE-2017-17405, https://www.ruby-lang.org/en/news/2017/12/14/net-ftp-command-injection-cve-2017-17405/, https://github.com/ruby/ruby/commit/6d3f72e5be2312be312f2acbf3465b05293c1431, https://www.ruby-lang.org/en/news/2017/12/14/ruby-2-4-3-released/, https://ubuntu.com/security/notices/USN-3515-1, https://www.cve.org/CVERecord?id=CVE-2017-17405