CVE-2018-20834
7.5 · HIGHOverview
CVE-2018-20834 is a high-severity vulnerability affecting isaacs tar. It was published on April 30, 2019 and has a CVSS 3.0 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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).
Remediation
Check the references section for vendor advisories and patches from isaacs. Update tar to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| isaacs | tar | >= 0, < 2.2.2 | Affected |
References
Frequently Asked Questions
What is CVE-2018-20834?
CVE-2018-20834 is a high-severity vulnerability affecting isaacs tar. It was published on April 30, 2019 and has a CVSS 3.0 base score of 7.5 (HIGH).
How severe is CVE-2018-20834?
This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2018-20834?
Check the references section for vendor advisories and patches from isaacs. Update tar to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2018-20834?
CyberStrike's AI-powered security agents can automatically detect CVE-2018-20834 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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