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commit fe3c49c9baeeab58304ede915b7edd18ecf360fc
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Author: usa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
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Date: Sat Jul 3 17:10:28 2021 +0000
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merge revision(s) b1c73f23,c9ab8fe2: [Backport #17877]
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[ruby/rdoc] Use File.open to fix the OS Command Injection vulnerability in CVE-2021-31799
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https://github.com/ruby/rdoc/commit/a7f5d6ab88
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The test for command injection on Unix platforms should be omitted on Windows
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_6@67947 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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diff --git a/lib/rdoc/rdoc.rb b/lib/rdoc/rdoc.rb
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index ca2c1abefd..46aace7839 100644
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--- a/lib/rdoc/rdoc.rb
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+++ b/lib/rdoc/rdoc.rb
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@@ -436,7 +436,7 @@ def remove_unparseable files
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files.reject do |file|
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file =~ /\.(?:class|eps|erb|scpt\.txt|svg|ttf|yml)$/i or
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(file =~ /tags$/i and
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- open(file, 'rb') { |io|
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+ File.open(file, 'rb') { |io|
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io.read(100) =~ /\A(\f\n[^,]+,\d+$|!_TAG_)/
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})
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end
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--- a/lib/rdoc/encoding.rb 2022-02-16 16:51:28.080178281 +0100
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+++ b/lib/rdoc/encoding.rb 2022-02-16 16:51:37.108160840 +0100
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@@ -18,7 +18,7 @@
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# unknown character in the target encoding will be replaced with '?'
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def self.read_file filename, encoding, force_transcode = false
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- content = open filename, "rb" do |f| f.read end
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+ content = File.open filename, "rb" do |f| f.read end
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content.gsub!("\r\n", "\n") if RUBY_PLATFORM =~ /mswin|mingw/
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utf8 = content.sub!(/\A\xef\xbb\xbf/, '')
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--- a/lib/rdoc/parser.rb 2021-04-05 13:46:35.000000000 +0200
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+++ b/lib/rdoc/parser.rb 2022-02-16 15:37:17.904822389 +0100
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@@ -74,7 +74,12 @@
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def self.binary?(file)
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return false if file =~ /\.(rdoc|txt)$/
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- s = File.read(file, 1024) or return false
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+ begin
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+ open_file = File.open(file)
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+ s = open_file.read(1024) or return false
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+ ensure
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+ open_file.close if open_file
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+ end
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return true if s[0, 2] == Marshal.dump('')[0, 2] or s.index("\x00")
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@@ -92,7 +97,8 @@
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# http://www.garykessler.net/library/file_sigs.html
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def self.zip? file
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- zip_signature = File.read file, 4
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+ zip_signature = ''
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+ File.open(file) { |f| zip_signature = f.read(4) }
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zip_signature == "PK\x03\x04" or
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zip_signature == "PK\x05\x06" or
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diff --git a/test/rdoc/test_rdoc_rdoc.rb b/test/rdoc/test_rdoc_rdoc.rb
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index 3bce54b243..123b1a4f87 100644
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--- a/test/rdoc/test_rdoc_rdoc.rb
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+++ b/test/rdoc/test_rdoc_rdoc.rb
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@@ -366,6 +366,18 @@ def test_remove_unparseable_tags_vim
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end
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end
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+ def test_remove_unparseable_CVE_2021_31799
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+ skip 'for Un*x platforms' if Gem.win_platform?
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+ temp_dir do
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+ file_list = ['| touch evil.txt && echo tags']
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+ file_list.each do |f|
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+ FileUtils.touch f
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+ end
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+ assert_equal file_list, @rdoc.remove_unparseable(file_list)
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+ assert_equal file_list, Dir.children('.')
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+ end
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+ end
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+
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def test_setup_output_dir
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Dir.mktmpdir {|d|
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path = File.join d, 'testdir'
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