Command Injection Vulnerability in Ruby's Net::FTP Library

CVE-2017-17405 · HIGH Severity

AV:N/AC:M/AU:N/C:C/I:C/A:C

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.

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