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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 9 | ruby2.3 | 2.3.3-1+deb9u3 | DSA-4259-1 |
| Debian 8 | ruby2.1 | 2.1.5-2+deb8u4 | DLA-1421-1 |
| Debian 7 | ruby1.8 | 1.8.7.358-7.1+deb7u5 | DLA-1222-1 |
| Debian 7 | ruby1.9.1 | 1.9.3.194-8.1+deb7u7 | DLA-1221-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | ruby2.3 | 2.3.1-2~16.04.4 | USN-3515-1 |
| Ubuntu 14.04 LTS | ruby1.9.1 | 1.9.3.484-2ubuntu1.6 | USN-3515-1 |
| Ubuntu 14.04 LTS | ruby2.0 | 2.0.0.484-1ubuntu2.5 | USN-3515-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | ruby +5 | 2.0.0.648-33.el7_4 | RHSA-2018:0378 |
| RHEL 7 | rubygem-bigdecimal | 1.2.0-33.el7_4 | RHSA-2018:0378 |
| RHEL 7 | rubygem-io-console | 0.4.2-33.el7_4 | RHSA-2018:0378 |
| RHEL 7 | rubygem-json | 1.7.7-33.el7_4 | RHSA-2018:0378 |
| RHEL 7 | rubygem-minitest | 4.3.2-33.el7_4 | RHSA-2018:0378 |
| RHEL 7 | rubygem-psych | 2.0.0-33.el7_4 | RHSA-2018:0378 |
| RHEL 7 | rubygem-rake | 0.9.6-33.el7_4 | RHSA-2018:0378 |
| RHEL 7 | rubygem-rdoc | 4.0.0-33.el7_4 | RHSA-2018:0378 |
| RHEL 7 | rubygems +1 | 2.0.14.1-33.el7_4 | RHSA-2018:0378 |
| RHEL 3 | rh-ruby22-ruby +5 | 2.2.9-19.el6 | RHSA-2018:0583 |
| RHEL 3 | rh-ruby22-rubygem-bigdecimal | 1.2.6-19.el6 | RHSA-2018:0583 |
| RHEL 3 | rh-ruby22-rubygem-io-console | 0.4.3-19.el6 | RHSA-2018:0583 |
| RHEL 3 | rh-ruby22-rubygem-json | 1.8.1.1-19.el6 | RHSA-2018:0583 |
| RHEL 3 | rh-ruby22-rubygem-minitest | 5.4.3-19.el6 | RHSA-2018:0583 |
| RHEL 3 | rh-ruby22-rubygem-power_assert | 0.2.2-19.el6 | RHSA-2018:0583 |
| RHEL 3 | rh-ruby22-rubygem-psych | 2.0.8.1-19.el6 | RHSA-2018:0583 |
| RHEL 3 | rh-ruby22-rubygem-rake | 10.4.2-19.el6 | RHSA-2018:0583 |
| RHEL 3 | rh-ruby22-rubygem-rdoc | 4.2.0-19.el6 | RHSA-2018:0583 |
| RHEL 3 | rh-ruby22-rubygem-test-unit | 3.0.8-19.el6 | RHSA-2018:0583 |
| RHEL 3 | rh-ruby22-rubygems +1 | 2.4.5.4-19.el6 | RHSA-2018:0583 |
| RHEL 3 | rh-ruby23-ruby +5 | 2.3.6-67.el6 | RHSA-2018:0585 |
| RHEL 3 | rh-ruby23-rubygem-bigdecimal | 1.2.8-67.el6 | RHSA-2018:0585 |
| RHEL 3 | rh-ruby23-rubygem-did_you_mean | 1.0.0-67.el6 | RHSA-2018:0585 |
| RHEL 3 | rh-ruby23-rubygem-io-console | 0.4.5-67.el6 | RHSA-2018:0585 |
| RHEL 3 | rh-ruby23-rubygem-json | 1.8.3.1-67.el6 | RHSA-2018:0585 |
| RHEL 3 | rh-ruby23-rubygem-minitest | 5.8.5-67.el6 | RHSA-2018:0585 |
| RHEL 3 | rh-ruby23-rubygem-net-telnet | 0.1.1-67.el6 | RHSA-2018:0585 |
| RHEL 3 | rh-ruby23-rubygem-power_assert | 0.2.6-67.el6 | RHSA-2018:0585 |
| RHEL 3 | rh-ruby23-rubygem-psych | 2.1.0.1-67.el6 | RHSA-2018:0585 |
| RHEL 3 | rh-ruby23-rubygem-rake | 10.4.2-67.el6 | RHSA-2018:0585 |
| RHEL 3 | rh-ruby23-rubygem-rdoc | 4.2.1-67.el6 | RHSA-2018:0585 |
| RHEL 3 | rh-ruby23-rubygem-test-unit | 3.1.5-67.el6 | RHSA-2018:0585 |
| RHEL 3 | rh-ruby23-rubygems +1 | 2.5.2.2-67.el6 | RHSA-2018:0585 |
| RHEL 3 | rh-ruby24-ruby +4 | 2.4.3-90.el6 | RHSA-2018:0584 |
| RHEL 3 | rh-ruby24-rubygem-bigdecimal | 1.3.0-90.el6 | RHSA-2018:0584 |
| RHEL 3 | rh-ruby24-rubygem-did_you_mean | 1.1.0-90.el6 | RHSA-2018:0584 |
| RHEL 3 | rh-ruby24-rubygem-io-console | 0.4.6-90.el6 | RHSA-2018:0584 |
| RHEL 3 | rh-ruby24-rubygem-json | 2.0.4-90.el6 | RHSA-2018:0584 |
| RHEL 3 | rh-ruby24-rubygem-minitest | 5.10.1-90.el6 | RHSA-2018:0584 |
| RHEL 3 | rh-ruby24-rubygem-net-telnet | 0.1.1-90.el6 | RHSA-2018:0584 |
| RHEL 3 | rh-ruby24-rubygem-openssl | 2.0.5-90.el6 | RHSA-2018:0584 |
| RHEL 3 | rh-ruby24-rubygem-power_assert | 0.4.1-90.el6 | RHSA-2018:0584 |
| RHEL 3 | rh-ruby24-rubygem-psych | 2.2.2-90.el6 | RHSA-2018:0584 |
| RHEL 3 | rh-ruby24-rubygem-rake | 12.0.0-90.el6 | RHSA-2018:0584 |
| RHEL 3 | rh-ruby24-rubygem-rdoc | 5.0.0-90.el6 | RHSA-2018:0584 |
| RHEL 3 | rh-ruby24-rubygem-test-unit | 3.2.3-90.el6 | RHSA-2018:0584 |
| RHEL 3 | rh-ruby24-rubygem-xmlrpc | 0.2.1-90.el6 | RHSA-2018:0584 |
| RHEL 3 | rh-ruby24-rubygems +1 | 2.6.14-90.el6 | RHSA-2018:0584 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7.3 TUS | ruby +5 | 2.0.0.648-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 TUS | rubygem-bigdecimal | 1.2.0-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 TUS | rubygem-io-console | 0.4.2-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 TUS | rubygem-json | 1.7.7-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 TUS | rubygem-minitest | 4.3.2-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 TUS | rubygem-psych | 2.0.0-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 TUS | rubygem-rake | 0.9.6-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 TUS | rubygem-rdoc | 4.0.0-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 TUS | rubygems +1 | 2.0.14.1-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 E4S | ruby +5 | 2.0.0.648-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 E4S | rubygem-bigdecimal | 1.2.0-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 E4S | rubygem-io-console | 0.4.2-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 E4S | rubygem-json | 1.7.7-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 E4S | rubygem-minitest | 4.3.2-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 E4S | rubygem-psych | 2.0.0-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 E4S | rubygem-rake | 0.9.6-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 E4S | rubygem-rdoc | 4.0.0-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 E4S | rubygems +1 | 2.0.14.1-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 AUS | ruby +5 | 2.0.0.648-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 AUS | rubygem-bigdecimal | 1.2.0-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 AUS | rubygem-io-console | 0.4.2-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 AUS | rubygem-json | 1.7.7-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 AUS | rubygem-minitest | 4.3.2-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 AUS | rubygem-psych | 2.0.0-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 AUS | rubygem-rake | 0.9.6-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 AUS | rubygem-rdoc | 4.0.0-30.el7_3 | RHSA-2019:2806 |
| RHEL 7.3 AUS | rubygems +1 | 2.0.14.1-30.el7_3 | RHSA-2019:2806 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SLES 12 SP4 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SLES 12 SP3 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SLES 12 SP2 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SLES 12 SP2 | yast2-ruby-bindings | 3.1.53-9.8.1 | SUSE-SU-2020:1570-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SLES for SAP 12 SP4 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SLES for SAP 12 SP3 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SLES for SAP 12 SP2 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SLES for SAP 12 SP2 | yast2-ruby-bindings | 3.1.53-9.8.1 | SUSE-SU-2020:1570-1 |
| SUSE OpenStack Cloud Crowbar 8 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SUSE OpenStack Cloud 8 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SUSE OpenStack Cloud 7 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SUSE OpenStack Cloud 7 | yast2-ruby-bindings | 3.1.53-9.8.1 | SUSE-SU-2020:1570-1 |
| SUSE HPE Helion OpenStack 8 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
| SUSE Enterprise Storage 5 | ruby2.1 | 2.1.9-19.3.2 | SUSE-SU-2020:1570-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | ruby | 2.4.3-r0 | — |
| Alpine v3.23 | ruby | 2.4.3-r0 | — |
| Alpine v3.22 | ruby | 2.4.3-r0 | — |
| Alpine v3.21 | ruby | 2.4.3-r0 | — |
| Alpine v3.20 | ruby | 2.4.3-r0 | — |
Show 17 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | ruby | 2.4.3-r0 | — |
| Alpine v3.18 | ruby | 2.4.3-r0 | — |
| Alpine v3.17 | ruby | 2.4.3-r0 | — |
| Alpine v3.16 | ruby | 2.4.3-r0 | — |
| Alpine v3.15 | ruby | 2.4.3-r0 | — |
| Alpine v3.14 | ruby | 2.4.3-r0 | — |
| Alpine v3.13 | ruby | 2.4.3-r0 | — |
| Alpine v3.12 | ruby | 2.4.3-r0 | — |
| Alpine v3.11 | ruby | 2.4.3-r0 | — |
| Alpine v3.10 | ruby | 2.4.3-r0 | — |
| Alpine v3.9 | ruby | 2.4.3-r0 | — |
| Alpine v3.8 | ruby | 2.4.3-r0 | — |
| Alpine v3.7 | ruby | 2.4.3-r0 | — |
| Alpine v3.6 | ruby | 2.4.3-r0 | — |
| Alpine v3.5 | ruby | 2.3.6-r0 | — |
| Alpine v3.4 | ruby | 2.3.6-r0 | — |
| Alpine v3.3 | ruby | 2.2.9-r0 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | ruby +5 | 2.0.0.648-33.el7_4 | ELSA-2018-0378 |
| Oracle Linux 7 | rubygem-bigdecimal | 1.2.0-33.el7_4 | ELSA-2018-0378 |
| Oracle Linux 7 | rubygem-io-console | 0.4.2-33.el7_4 | ELSA-2018-0378 |
| Oracle Linux 7 | rubygem-json | 1.7.7-33.el7_4 | ELSA-2018-0378 |
| Oracle Linux 7 | rubygem-minitest | 4.3.2-33.el7_4 | ELSA-2018-0378 |
| Oracle Linux 7 | rubygem-psych | 2.0.0-33.el7_4 | ELSA-2018-0378 |
| Oracle Linux 7 | rubygem-rake | 0.9.6-33.el7_4 | ELSA-2018-0378 |
| Oracle Linux 7 | rubygem-rdoc | 4.0.0-33.el7_4 | ELSA-2018-0378 |
| Oracle Linux 7 | rubygems +1 | 2.0.14.1-33.el7_4 | ELSA-2018-0378 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Ruby < 2.2.8 / < 2.3.5 / < 2.4.2 / < 2.5.0-preview1 - 'NET::Ftp' Command Injection EDB-43381 · local · Dec 2, 2017
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 12
- RHSA-2019:2806 Red Hat Security Advisory: ruby security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:0585 Red Hat Security Advisory: rh-ruby23-ruby security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:0584 Red Hat Security Advisory: rh-ruby24-ruby security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:0583 Red Hat Security Advisory: rh-ruby22-ruby security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2018:0378 Red Hat Security Advisory: ruby security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-3515-1 ruby1.9.1, ruby2.0, ruby2.3 vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4259-1 ruby2.3 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1222-1 ruby1.8 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1221-1 ruby1.9.1 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1421-1 ruby2.1 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2020:1570-1 Security update for ruby2.1 SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2018-0378 Important: ruby security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 28, 2018
References
- RHSA-2018:0585 vendor-advisory
- [debian-lts-announce] 20171225 [SECURITY] [DLA 1222-1] ruby1.8 security update mailing-list
- RHSA-2018:0378 vendor-advisory
- 102204 vdb-entry
- 1042004 vdb-entry
- https://www.ruby-lang.org/en/news/2017/12/14/net-ftp-command-injection-cve-2017-17405/
- 43381 exploit
- RHSA-2018:0584 vendor-advisory
- https://www.ruby-lang.org/en/news/2017/12/14/ruby-2-4-3-released/
- [debian-lts-announce] 20180714 [SECURITY] [DLA 1421-1] ruby2.1 security update mailing-list
- RHSA-2018:0583 vendor-advisory
- [debian-lts-announce] 20171225 [SECURITY] [DLA 1221-1] ruby1.9.1 security update mailing-list
- DSA-4259 vendor-advisory
- RHSA-2019:2806 vendor-advisory