CVE-2018-20821 (Medium) detected in node-sass-v4.12.0

[mend-bolt-for-github]

CVE-2018-20821 - Medium Severity Vulnerability

Vulnerable Library - node-sassv4.12.0

🌈 Node.js bindings to libsass

Library home page: https://github.com/sass/node-sass.git

Found in HEAD commit: b2e294627b8b0f8cbc52182ef71d4641b85e3721

Library Source Files (125)

* The source files were matched to this source library based on a best effort match. Source libraries are selected from a list of probable public libraries.

• /ObjectBuilder/node_modules/node-sass/src/libsass/src/expand.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/color_maps.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/sass_util.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/utf8/unchecked.h
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/output.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/sass_values.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/util.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/emitter.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/lexer.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/test/test_node.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/plugins.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/include/sass/base.h
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/position.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/subset_map.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/operation.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/remove_placeholders.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/error_handling.hpp
• /ObjectBuilder/node_modules/node-sass/src/custom_importer_bridge.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/contrib/plugin.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/functions.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/test/test_superselector.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/eval.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/utf8_string.hpp
• /ObjectBuilder/node_modules/node-sass/src/sass_context_wrapper.h
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/error_handling.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/node.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/parser.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/subset_map.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/emitter.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/listize.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/ast.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/sass_functions.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/memory/SharedPtr.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/output.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/check_nesting.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/ast_def_macros.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/functions.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/cssize.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/prelexer.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/paths.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/ast_fwd_decl.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/inspect.hpp
• /ObjectBuilder/node_modules/node-sass/src/sass_types/color.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/test/test_unification.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/values.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/sass_util.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/source_map.hpp
• /ObjectBuilder/node_modules/node-sass/src/sass_types/list.h
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/check_nesting.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/json.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/units.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/units.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/context.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/utf8/checked.h
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/listize.hpp
• /ObjectBuilder/node_modules/node-sass/src/sass_types/string.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/prelexer.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/context.hpp
• /ObjectBuilder/node_modules/node-sass/src/sass_types/boolean.h
• /ObjectBuilder/node_modules/node-sass/src/libsass/include/sass2scss.h
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/eval.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/expand.cpp
• /ObjectBuilder/node_modules/node-sass/src/sass_types/factory.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/operators.cpp
• /ObjectBuilder/node_modules/node-sass/src/sass_types/boolean.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/source_map.cpp
• /ObjectBuilder/node_modules/node-sass/src/sass_types/value.h
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/utf8_string.cpp
• /ObjectBuilder/node_modules/node-sass/src/callback_bridge.h
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/file.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/sass.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/node.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/environment.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/extend.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/sass_context.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/operators.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/constants.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/sass.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/ast_fwd_decl.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/parser.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/constants.cpp
• /ObjectBuilder/node_modules/node-sass/src/sass_types/list.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/cssize.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/include/sass/functions.h
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/util.cpp
• /ObjectBuilder/node_modules/node-sass/src/custom_function_bridge.cpp
• /ObjectBuilder/node_modules/node-sass/src/custom_importer_bridge.h
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/bind.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/inspect.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/sass_functions.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/backtrace.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/extend.cpp
• /ObjectBuilder/node_modules/node-sass/src/sass_types/sass_value_wrapper.h
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/debugger.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/cencode.c
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/base64vlq.cpp
• /ObjectBuilder/node_modules/node-sass/src/sass_types/number.cpp
• /ObjectBuilder/node_modules/node-sass/src/sass_types/color.h
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/c99func.c
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/position.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/remove_placeholders.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/sass_values.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/include/sass/values.h
• /ObjectBuilder/node_modules/node-sass/src/libsass/test/test_subset_map.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/sass2scss.cpp
• /ObjectBuilder/node_modules/node-sass/src/sass_types/null.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/ast.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/include/sass/context.h
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/to_c.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/to_value.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/color_maps.hpp
• /ObjectBuilder/node_modules/node-sass/src/sass_context_wrapper.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/script/test-leaks.pl
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/lexer.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/memory/SharedPtr.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/to_c.hpp
• /ObjectBuilder/node_modules/node-sass/src/sass_types/map.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/to_value.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/b64/encode.h
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/file.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/environment.hpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/plugins.hpp
• /ObjectBuilder/node_modules/node-sass/src/binding.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/sass_context.cpp
• /ObjectBuilder/node_modules/node-sass/src/libsass/src/debug.hpp

Vulnerability Details

The parsing component in LibSass through 3.5.5 allows attackers to cause a denial-of-service (uncontrolled recursion in Sass::Parser::parse_css_variable_value in parser.cpp).

Publish Date: 2019-04-23

URL: CVE-2018-20821

CVSS 3 Score Details (6.5)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: High

For more information on CVSS3 Scores, click here.

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