| Package | Affected versions | Patched versions |
|---|---|---|
| ruby | = 2.5.0≥ 2.2, ≤ 2.2.8≥ 2.3, ≤ 2.3.5≥ 2.4, ≤ 2.4.2 |
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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