PT-2019-2860 · Node.Js · Node-Tar

Max · Published 2019-04-03 · Updated 2026-02-04 · CVE-2018-20834

Positive Technologies (AI Summary)

CVSS v2.0

10

High

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions node-tar versions prior to 4.4.2 node-tar version 2.2.2 is not affected, but versions prior to 2.2.2 are affected

Description The issue is related to incorrect link resolution before file access in the node-tar module of the Node.js library. This can allow a remote attacker to replace existing file content when extracting a tarball containing a hardlink to a file that already exists on the system, followed by a plain file with the same name as the hardlink.

Recommendations For node-tar versions prior to 4.4.2, upgrade to version 4.4.2 or later. For node-tar versions prior to 2.2.2, upgrade to version 2.2.2 or later.

Exploit

Fix

Link Following

Weakness Enumeration

CWE-59

Related Identifiers

BDU:2019-02828

CVE-2018-20834

GHSA-J44M-QM6P-HP7M

RHSA-2019:1821

Affected Products

Node-Tar

References · 15

• 🔥 https://hackerone.com/reports/344595 · Exploit
• https://github.com/npm/node-tar/commit/b0c58433c22f5e7fe8b1c76373f27e3f81dcd4c8 · Patch
• https://github.com/npm/node-tar/compare/58a8d43...a5f7779 · Patch
• https://security-tracker.debian.org/tracker/CVE-2018-20834 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-20834 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-j44m-qm6p-hp7m · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2019:1821 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-02828 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2018-20834 · Security Note
• https://osv.dev/vulnerability/CVE-2018-20834 · Vendor Advisory
• https://github.com/isaacs/node-tar · Note
• https://github.com/npm/node-tar/commits/v2.2.2 · Note
• https://github.com/npm/node-tar/commit/7ecef07da6a9e72cc0c4d0c9c6a8e85b6b52395d · Note
• https://access.redhat.com/security/cve/cve-2018-20834 · Note
• https://t.me/cveNotify/150888 · Telegram Post