CVE-2017-17405

high-risk
Published 2017-12-15

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.

Do I need to act?

!
88.6% chance of exploitation in next 30 days
EPSS score — higher than 11% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
!
1 public exploit available
43381
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10 High
NETWORK / LOW complexity

Affected Products (15)

Affected Vendors

Debian Redhat Ruby-Lang

References (28)

Third Party Advisory http://www.securityfocus.com/bid/102204
Third Party Advisory http://www.securitytracker.com/id/1042004
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:0378
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:0583
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:0584
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:0585
https://access.redhat.com/errata/RHSA-2019:2806
Mailing List https://lists.debian.org/debian-lts-announce/2017/12/msg00024.html
Mailing List https://lists.debian.org/debian-lts-announce/2017/12/msg00025.html
Mailing List https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
Third Party Advisory https://www.debian.org/security/2018/dsa-4259
Exploit https://www.exploit-db.com/exploits/43381/
Vendor Advisory https://www.ruby-lang.org/en/news/2017/12/14/net-ftp-command-injection-cve-2017-...
Patch https://www.ruby-lang.org/en/news/2017/12/14/ruby-2-4-3-released/
Third Party Advisory http://www.securityfocus.com/bid/102204
Third Party Advisory http://www.securitytracker.com/id/1042004
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:0378
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:0583
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:0584
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:0585
and 8 more references
68
/ 100
high-risk
Severity 30/34 · Critical
Exploitability 20/34 · Moderate
Exposure 18/34 · Moderate