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(PA-6507) Patch rexml gem for CVE-2024-35176
- Ruby 3.2.4 has rexml as its bundled gem, so the patch was applied after the install step since bundled gems are available in the build after the install step. They are present in the .bundle folder. - Ruby 2.7.8 has rexml as its default gem, so we can go with the usual way to patch it. - The upstream fix commit: ruby/rexml@4325835
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‎configs/components/ruby-2.7.8.rb‎

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@@ -42,6 +42,9 @@
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pkg.apply_patch "#{base}/uri-redos-cve-2023-36617.patch"
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# This patch is not required for ruby >= 3.3.3
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pkg.apply_patch "#{base}/rexml_for_CVE-2024-35176.patch"
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if platform.is_cross_compiled?
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unless platform.is_macos?
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pkg.apply_patch "#{base}/uri_generic_remove_safe_nav_operator_r2.5.patch"

‎configs/components/ruby-3.2.4.rb‎

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@@ -38,6 +38,7 @@
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base = 'resources/patches/ruby_32'
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if platform.is_cross_compiled?
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pkg.apply_patch "#{base}/rbinstall_gem_path.patch"
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end
@@ -300,4 +301,18 @@
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]
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end
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end
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#########
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# BUILD
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#########
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pkg.add_source("file://resources/patches/ruby_32/rexml_for_CVE-2024-35176.patch")
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pkg.build do
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# This patch is applied after install because rexml gem is the bundled gem hence build
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# cannot find the path of the files to be patched prior to configuring and installing.
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# This patch is not required for ruby >= 3.3.3
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steps = ["#{platform.patch} --strip=1 --fuzz=0 --ignore-whitespace --no-backup-if-mismatch < ../rexml_for_CVE-2024-35176.patch"]
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end
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end

‎resources/patches/ruby_27/rexml_for_CVE-2024-35176.patch‎

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commit e597f07718c27dc4414ad39f121376e53056475a
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Author: Shubham Shinde <[email protected]>
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Date: Tue Jul 9 19:40:43 2024 +0530
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Read quoted attributes in chunks (#126)
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# Conflicts:
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# lib/rexml/parsers/baseparser.rb
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# lib/rexml/source.rb
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diff --git a/lib/rexml/parsers/baseparser.rb b/lib/rexml/parsers/baseparser.rb
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index f76aed0..f0b365d 100644
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--- a/lib/rexml/parsers/baseparser.rb
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+++ b/lib/rexml/parsers/baseparser.rb
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@@ -518,25 +518,43 @@ module REXML
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message = "Missing attribute equal: <#{name}>"
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raise REXML::ParseException.new(message, @source)
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end
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- quote = scanner.scan(/['"]/)
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- unless quote
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+ unless match = @source.match(/(['"])/, true)
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message = "Missing attribute value start quote: <#{name}>"
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raise REXML::ParseException.new(message, @source)
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end
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- unless scanner.scan(/.*#{Regexp.escape(quote)}/um)
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- match_data = @source.match(/^(.*?)(\/)?>/um, true)
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- if match_data
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- scanner << "/" if closed
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- scanner << ">"
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- scanner << match_data[1]
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- scanner.pos = pos
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- closed = !match_data[2].nil?
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- next
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- end
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- message =
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- "Missing attribute value end quote: <#{name}>: <#{quote}>"
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+ quote = match[1]
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+ value = @source.read_until(quote)
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+ unless value.chomp!(quote)
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+ message = "Missing attribute value end quote: <#{name}>: <#{quote}>"
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raise REXML::ParseException.new(message, @source)
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end
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+ @source.match(/\s*/um, true)
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+ if prefix == "xmlns"
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+ if local_part == "xml"
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+ if value != "http://www.w3.org/XML/1998/namespace"
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+ msg = "The 'xml' prefix must not be bound to any other namespace "+
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+ "(http://www.w3.org/TR/REC-xml-names/#ns-decl)"
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+ raise REXML::ParseException.new( msg, @source, self )
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+ end
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+ elsif local_part == "xmlns"
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+ msg = "The 'xmlns' prefix must not be declared "+
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+ "(http://www.w3.org/TR/REC-xml-names/#ns-decl)"
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+ raise REXML::ParseException.new( msg, @source, self)
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+ end
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+ curr_ns << local_part
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+ elsif prefix
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+ prefixes << prefix unless prefix == "xml"
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+ end
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+
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+ if attributes[name]
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+ msg = "Duplicate attribute #{name.inspect}"
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+ raise REXML::ParseException.new(msg, @source, self)
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+ end
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+
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+ attributes[name] = value
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+ else
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+ message = "Invalid attribute name: <#{@source.buffer.split(%r{[/>\s]}).first}>"
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+ raise REXML::ParseException.new(message, @source)
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end
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name = scanner[1]
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prefix = scanner[2]
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diff --git a/lib/rexml/source.rb b/lib/rexml/source.rb
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index 770aefc..86bf6cf 100644
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--- a/lib/rexml/source.rb
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+++ b/lib/rexml/source.rb
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@@ -81,7 +81,11 @@ module REXML
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rv
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end
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- def read
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+ def read(term = nil)
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+ end
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+
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+ def read_until(term)
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+ @scanner.scan_until(Regexp.union(term)) or @scanner.rest
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end
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def consume( pattern )
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@@ -204,9 +208,9 @@ module REXML
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rv
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end
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- def read
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+ def read(term = nil)
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begin
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- @buffer << readline
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+ @buffer << readline(term)
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rescue Exception, NameError
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@source = nil
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end
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@@ -216,6 +220,21 @@ module REXML
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match( pattern, true )
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end
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+ def read_until(term)
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+ pattern = Regexp.union(term)
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+ data = []
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+ begin
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+ until str = @scanner.scan_until(pattern)
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+ @scanner << readline(term)
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+ end
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+ rescue EOFError
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+ @scanner.rest
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+ else
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+ read if @scanner.eos? and [email protected]?
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+ str
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+ end
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+ end
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+
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def match( pattern, cons=false )
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rv = pattern.match(@buffer)
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@buffer = $' if cons and rv
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@@ -263,8 +282,8 @@ module REXML
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end
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private
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- def readline
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- str = @source.readline(@line_break)
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+ def readline(term = nil)
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+ str = @source.readline(term || @line_break)
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if @pending_buffer
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if str.nil?
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str = @pending_buffer

‎resources/patches/ruby_32/rexml_for_CVE-2024-35176.patch‎

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diff --git a/.bundle/gems/rexml-3.2.5/lib/rexml/source.rb b/.bundle/gems/rexml-3.2.5/lib/rexml/source.rb
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index 90b370b..373abcf 100644
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--- a/.bundle/gems/rexml-3.2.5/lib/rexml/source.rb
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+++ b/.bundle/gems/rexml-3.2.5/lib/rexml/source.rb
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@@ -81,7 +81,11 @@ module REXML
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rv
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end
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- def read
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+ def read(term = nil)
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+ end
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+
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+ def read_until(term)
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+ @scanner.scan_until(Regexp.union(term)) or @scanner.rest
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end
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def consume( pattern )
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@@ -204,14 +208,29 @@ module REXML
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rv
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end
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- def read
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+ def read(term = nil)
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begin
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- @buffer << readline
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+ @buffer << readline(term)
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rescue Exception, NameError
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@source = nil
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end
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end
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+ def read_until(term)
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+ pattern = Regexp.union(term)
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+ data = []
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+ begin
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+ until str = @scanner.scan_until(pattern)
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+ @scanner << readline(term)
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+ end
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+ rescue EOFError
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+ @scanner.rest
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+ else
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+ read if @scanner.eos? and [email protected]?
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+ str
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+ end
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+ end
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+
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def consume( pattern )
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match( pattern, true )
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end
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@@ -263,8 +282,8 @@ module REXML
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end
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private
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- def readline
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- str = @source.readline(@line_break)
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+ def readline(term = nil)
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+ str = @source.readline(term || @line_break)
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if @pending_buffer
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if str.nil?
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str = @pending_buffer
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diff --git a/.bundle/gems/rexml-3.2.5/lib/rexml/parsers/baseparser.rb b/.bundle/gems/rexml-3.2.5/lib/rexml/parsers/baseparser.rb
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index 305b120..7001bb2 100644
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--- a/.bundle/gems/rexml-3.2.5/lib/rexml/parsers/baseparser.rb
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+++ b/.bundle/gems/rexml-3.2.5/lib/rexml/parsers/baseparser.rb
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@@ -618,25 +618,43 @@ module REXML
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message = "Missing attribute equal: <#{name}>"
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raise REXML::ParseException.new(message, @source)
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end
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- quote = scanner.scan(/['"]/)
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- unless quote
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+ unless match = @source.match(/(['"])/, true)
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message = "Missing attribute value start quote: <#{name}>"
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raise REXML::ParseException.new(message, @source)
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end
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- unless scanner.scan(/.*#{Regexp.escape(quote)}/um)
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- match_data = @source.match(/^(.*?)(\/)?>/um, true)
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- if match_data
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- scanner << "/" if closed
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- scanner << ">"
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- scanner << match_data[1]
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- scanner.pos = pos
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- closed = !match_data[2].nil?
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- next
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- end
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- message =
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- "Missing attribute value end quote: <#{name}>: <#{quote}>"
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+ quote = match[1]
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+ value = @source.read_until(quote)
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+ unless value.chomp!(quote)
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+ message = "Missing attribute value end quote: <#{name}>: <#{quote}>"
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raise REXML::ParseException.new(message, @source)
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end
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+ @source.match(/\s*/um, true)
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+ if prefix == "xmlns"
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+ if local_part == "xml"
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+ if value != "http://www.w3.org/XML/1998/namespace"
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+ msg = "The 'xml' prefix must not be bound to any other namespace "+
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+ "(http://www.w3.org/TR/REC-xml-names/#ns-decl)"
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+ raise REXML::ParseException.new( msg, @source, self )
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+ end
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+ elsif local_part == "xmlns"
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+ msg = "The 'xmlns' prefix must not be declared "+
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+ "(http://www.w3.org/TR/REC-xml-names/#ns-decl)"
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+ raise REXML::ParseException.new( msg, @source, self)
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+ end
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+ curr_ns << local_part
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+ elsif prefix
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+ prefixes << prefix unless prefix == "xml"
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+ end
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+
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+ if attributes[name]
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+ msg = "Duplicate attribute #{name.inspect}"
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+ raise REXML::ParseException.new(msg, @source, self)
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+ end
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+
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+ attributes[name] = value
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+ else
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+ message = "Invalid attribute name: <#{@source.buffer.split(%r{[/>\s]}).first}>"
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+ raise REXML::ParseException.new(message, @source)
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end
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name = scanner[1]
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prefix = scanner[2]

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