Vulnerability Report

CVE-2017-17405

Title: Ruby-Lang Ruby RCE

Arbitrary File Access

Proof Of Concept

PoC Available for CVE-2017-17405

CWE Category CWE-78

Published Date Dec 15, 2017

Modified Date May 13, 2026

Exploit Status Available

Score 8.8 CVSS v3.0

Exploit Probability (EPSS)

88.65%

Vulnerability Summary

CVE-2017-17405: 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.

Impacted Vendors

yukihiro_matsumoto 1

ruby-lang 1

Reference Links

http://www.securityfocus.com/bid/102204 http://www.securitytracker.com/id/1042004 https://access.redhat.com/errata/RHSA-2018:0378 https://access.redhat.com/errata/RHSA-2018:0583 https://access.redhat.com/errata/RHSA-2018:0584 https://access.redhat.com/errata/RHSA-2018:0585 https://access.redhat.com/errata/RHSA-2019:2806 https://lists.debian.org/debian-lts-announce/2017/12/msg00024.html https://lists.debian.org/debian-lts-announce/2017/12/msg00025.html https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html https://www.debian.org/security/2018/dsa-4259 https://www.exploit-db.com/exploits/43381/ https://www.ruby-lang.org/en/news/2017/12/14/net-ftp-command-injection-cve-2017-17405/ https://www.ruby-lang.org/en/news/2017/12/14/ruby-2-4-3-released/ http://www.securityfocus.com/bid/102204 http://www.securitytracker.com/id/1042004 https://access.redhat.com/errata/RHSA-2018:0378 https://access.redhat.com/errata/RHSA-2018:0583 https://access.redhat.com/errata/RHSA-2018:0584 https://access.redhat.com/errata/RHSA-2018:0585 https://access.redhat.com/errata/RHSA-2019:2806 https://lists.debian.org/debian-lts-announce/2017/12/msg00024.html https://lists.debian.org/debian-lts-announce/2017/12/msg00025.html https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html https://www.debian.org/security/2018/dsa-4259 https://www.exploit-db.com/exploits/43381/ https://www.ruby-lang.org/en/news/2017/12/14/net-ftp-command-injection-cve-2017-17405/ https://www.ruby-lang.org/en/news/2017/12/14/ruby-2-4-3-released/

CVSS v3.0

Source Entity [email protected]

Severity HIGH

8.8

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

REQUIRED

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2.0

Source Entity [email protected]

Severity HIGH

9.3

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:M/Au:N/C:C/I:C/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns