The OWASP NodeGoat project provides an environment to learn how OWASP Top 10 security risks apply to web applications developed using Node.js and how to effectively address them.
Vulnerable Package issue exists @ Npm-tar-2.2.1 in branch master
The npm package "tar" (aka node-tar) before versions 6.1.1, 5.0.6, 4.4.14, and 3.2.2 has a arbitrary File Creation/Overwrite vulnerability due to insufficient absolute path sanitization. node-tar aims to prevent extraction of absolute file paths by turning absolute paths into relative paths when the preservePaths flag is not set to true. This is achieved by stripping the absolute path root from any absolute file paths contained in a tar file. For example /home/user/.bashrc would turn into home/user/.bashrc. This logic was insufficient when file paths contained repeated path roots such as ////home/user/.bashrc. node-tar would only strip a single path root from such paths. When given an absolute file path with repeating path roots, the resulting path (e.g. ///home/user/.bashrc) would still resolve to an absolute path, thus allowing arbitrary file creation and overwrite. This issue was addressed in releases 3.2.2, 4.4.14, 5.0.6 and 6.1.1. Users may work around this vulnerability without upgrading by creating a custom onentry method which sanitizes the entry.path or a filter method which removes entries with absolute paths. See referenced GitHub Advisory for details. Be aware of CVE-2021-32803 which fixes a similar bug in later versions of tar.
Vulnerable Package issue exists @ Npm-tar-2.2.1 in branch master
The npm package "tar" (aka node-tar) before versions 6.1.1, 5.0.6, 4.4.14, and 3.2.2 has a arbitrary File Creation/Overwrite vulnerability due to insufficient absolute path sanitization. node-tar aims to prevent extraction of absolute file paths by turning absolute paths into relative paths when the
preservePathsflag is not set totrue. This is achieved by stripping the absolute path root from any absolute file paths contained in a tar file. For example/home/user/.bashrcwould turn intohome/user/.bashrc. This logic was insufficient when file paths contained repeated path roots such as////home/user/.bashrc.node-tarwould only strip a single path root from such paths. When given an absolute file path with repeating path roots, the resulting path (e.g.///home/user/.bashrc) would still resolve to an absolute path, thus allowing arbitrary file creation and overwrite. This issue was addressed in releases 3.2.2, 4.4.14, 5.0.6 and 6.1.1. Users may work around this vulnerability without upgrading by creating a customonentrymethod which sanitizes theentry.pathor afiltermethod which removes entries with absolute paths. See referenced GitHub Advisory for details. Be aware of CVE-2021-32803 which fixes a similar bug in later versions of tar.Namespace: RobertMickleCx Repository: NodeGoat Repository Url: https://github.com/RobertMickleCx/NodeGoat CxAST-Project: RobertMickleCx/NodeGoat CxAST platform scan: e7941f4d-fb14-4e6e-9cdc-c12dbbe3cdc7 Branch: master Application: NodeGoat Severity: HIGH State: NOT_IGNORED Status: RECURRENT CWE: CWE-22
Additional Info Attack vector: NETWORK Attack complexity: LOW Confidentiality impact: NONE Availability impact: HIGH
References Advisory Advisory Commit Commit Commit Commit