Link following in node-tar - CVE-2018-20834
Published: January 30, 2023
Vulnerability identifier: #VU71631
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-20834
CWE-ID: CWE-59
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to insecure following of hardlinks inside a tarball. A remote attacker can pass a specially crafted archive to the application and overwrite arbitrary files on the system.
Affected software
node-tar
IBM Planning Analytics Workspace
rh-nodejs8-nodejs (Red Hat package)
IBM Planning Analytics Workspace
rh-nodejs8-nodejs (Red Hat package)
How to mitigate CVE-2018-20834
Install updates from vendor's website.
node-tar - addressed in versions 2.2.2, 4.4.2
IBM Planning Analytics Workspace - update to 2.0.83
rh-nodejs8-nodejs (Red Hat package) - update to 8.16.0-1.el7
IBM Planning Analytics Workspace - update to 2.0.83
rh-nodejs8-nodejs (Red Hat package) - update to 8.16.0-1.el7
External References
- 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