CVE-2018-20834 – nodejs-tar: Arbitrary file overwrites when extracting tarballs containing a hard-link

https://notcve.org/view.php?id=CVE-2018-20834

A vulnerability was found in node-tar before version 4.4.2 (excluding version 2.2.2). An Arbitrary File Overwrite issue exists when extracting a tarball containing a hardlink to a file that already exists on the system, in conjunction with a later plain file with the same name as the hardlink. This plain file content replaces the existing file content. A patch has been applied to node-tar v2.2.2). Se detecto una vulnerabilidad en node-tar en versiones anteriores a la 4.4.2 (excluyendo la versión 2.2.2). • https://github.com/ossf-cve-benchmark/CVE-2018-20834 https://access.redhat.com/errata/RHSA-2019:1821 https://github.com/npm/node-tar/commit/7ecef07da6a9e72cc0c4d0c9c6a8e85b6b52395d https://github.com/npm/node-tar/commit/b0c58433c22f5e7fe8b1c76373f27e3f81dcd4c8 https://github.com/npm/node-tar/commits/v2.2.2 https://github.com/npm/node-tar/compare/58a8d43...a5f7779 https://hackerone.com/reports/344595 https://nvd.nist.gov/vuln/detail/CVE-2018-20834 https://access.redhat.com/security/cve&# • CWE-59: Improper Link Resolution Before File Access ('Link Following') •