Ruby 2.4.2-r1 -- CVE-2017-17405: Command injection vulnerability in Net::FTP
Description
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.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-17405
https://www.ruby-lang.org/en/news/2017/12/14/ruby-2-4-3-released/
(from redmine: issue id 8308, created on 2017-12-15, closed on 2019-02-25)