NVD

CVE-2018-20834 Detail

Modified

This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.

Current 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).

View Analysis Description

Severity

CVSS 3.x Severity and Metrics:

NIST: NVD

Base Score: 7.5 HIGH

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://access.redhat.com/errata/RHSA-2019:1821
https://github.com/npm/node-tar/commit/7ecef07da6a9e72cc0c4d0c9c6a8e85b6b52395d
https://github.com/npm/node-tar/commit/b0c58433c22f5e7fe8b1c76373f27e3f81dcd4c8	Patch Third Party Advisory
https://github.com/npm/node-tar/commits/v2.2.2
https://github.com/npm/node-tar/compare/58a8d43...a5f7779	Patch Third Party Advisory
https://hackerone.com/reports/344595	Exploit Third Party Advisory
https://nvd.nist.gov/vuln/detail/CVE-2018-20834

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-59	Improper Link Resolution Before File Access ('Link Following')	NIST

Known Affected Software Configurations Switch to CPE 2.2

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Change History

4 change records found show changes

CVE Modified by MITRE 9/04/2019 4:15:10 PM

Action	Type	Old Value	New Value
Changed	Description	A vulnerability was found in node-tar before version 4.4.2. 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 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).
Added	Reference		https://github.com/npm/node-tar/commit/7ecef07da6a9e72cc0c4d0c9c6a8e85b6b52395d [No Types Assigned]
Added	Reference		https://github.com/npm/node-tar/commits/v2.2.2 [No Types Assigned]
Added	Reference		https://nvd.nist.gov/vuln/detail/CVE-2018-20834 [No Types Assigned]

Initial Analysis by NIST 5/03/2019 10:36:29 AM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR cpe:2.3:a:node-tar_project:node-tar::::::::* versions up to (excluding) 4.4.2
Added	CVSS V2		(AV:N/AC:L/Au:N/C:N/I:P/A:P)
Added	CVSS V3		AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Added	CWE		CWE-59
Changed	Reference Type	https://github.com/npm/node-tar/commit/b0c58433c22f5e7fe8b1c76373f27e3f81dcd4c8 No Types Assigned	https://github.com/npm/node-tar/commit/b0c58433c22f5e7fe8b1c76373f27e3f81dcd4c8 Patch, Third Party Advisory
Changed	Reference Type	https://github.com/npm/node-tar/compare/58a8d43...a5f7779 No Types Assigned	https://github.com/npm/node-tar/compare/58a8d43...a5f7779 Patch, Third Party Advisory
Changed	Reference Type	https://hackerone.com/reports/344595 No Types Assigned	https://hackerone.com/reports/344595 Exploit, Third Party Advisory

Quick Info

CVE Dictionary Entry:
CVE-2018-20834
NVD Published Date:
04/30/2019
NVD Last Modified:
09/04/2019
Source:
MITRE

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National Vulnerability Database