Vulnerability Description
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).
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Isaacs | Tar | < 2.2.2 |
Related Weaknesses (CWE)
References
- https://access.redhat.com/errata/RHSA-2019:1821
- https://github.com/npm/node-tar/commit/7ecef07da6a9e72cc0c4d0c9c6a8e85b6b52395d
- https://github.com/npm/node-tar/commit/b0c58433c22f5e7fe8b1c76373f27e3f81dcd4c8PatchThird Party Advisory
- https://github.com/npm/node-tar/commits/v2.2.2
- https://github.com/npm/node-tar/compare/58a8d43...a5f7779PatchThird Party Advisory
- https://hackerone.com/reports/344595ExploitThird Party Advisory
- https://nvd.nist.gov/vuln/detail/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/b0c58433c22f5e7fe8b1c76373f27e3f81dcd4c8PatchThird Party Advisory
- https://github.com/npm/node-tar/commits/v2.2.2
- https://github.com/npm/node-tar/compare/58a8d43...a5f7779PatchThird Party Advisory
- https://hackerone.com/reports/344595ExploitThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-20834
FAQ
What is CVE-2018-20834?
CVE-2018-20834 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ex...
How severe is CVE-2018-20834?
CVE-2018-20834 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-20834?
Check the references section above for vendor advisories and patch information. Affected products include: Isaacs Tar.