node-tar is a full-featured Tar for Node.js. When using default options in versions 7.5.7 and below, an attacker-controlled archive can create a hardlink inside the extraction directory that points to a file outside the extraction root, enabling arbitrary file read and write as the extracting user. Severity is high because the primitive bypasses path protections and turns archive extraction into a direct filesystem access primitive.
This issue has been fixed in version 7.5.8.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Isaacs Tar
cpe:2.3:a:isaacs:tar:*:*:*:*:*:node.js:*:*
|
— |
7.5.8
|
References 3
https://github.com/isaacs/node-tar/commit/2cb1120bcefe28d7ecc719b41441ade59c52e…
security-advisories@github.com
https://github.com/isaacs/node-tar/commit/d18e4e1f846f4ddddc153b0f536a19c050e74…
security-advisories@github.com
https://github.com/isaacs/node-tar/security/advisories/GHSA-83g3-92jg-28cx
security-advisories@github.com