node-tar up to 4.4.1 Tarball link following

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability was found in node-tar up to 4.4.1. It has been rated as critical. The affected element is an unknown function of the component Tarball Handler. This manipulation causes link following. The identification of this vulnerability is CVE-2018-20834. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in node-tar up to 4.4.1 and classified as critical. Affected by this vulnerability is an unknown function of the component Tarball Handler. The manipulation with an unknown input leads to a link following vulnerability. The CWE definition for the vulnerability is CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. As an impact it is known to affect integrity, and availability. The summary by CVE is:

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).

The weakness was shared 04/30/2019 (Website). It is possible to read the advisory at access.redhat.com. This vulnerability is known as CVE-2018-20834 since 04/30/2019. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 4.4.2 eliminates this vulnerability.

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Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.8

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Link following
CWE: CWE-59
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: node-tar 4.4.2
Patch: github.com

Timelineinfo

04/30/2019 🔍
04/30/2019 +0 days 🔍
04/30/2019 +0 days 🔍
02/04/2026 +2472 days 🔍

Sourcesinfo

Advisory: RHSA-2019:1821
Status: Confirmed

CVE: CVE-2018-20834 (🔍)
GCVE (CVE): GCVE-0-2018-20834
GCVE (VulDB): GCVE-100-134239

Entryinfo

Created: 04/30/2019 23:07
Updated: 02/04/2026 21:03
Changes: 04/30/2019 23:07 (55), 06/05/2020 06:54 (1), 09/11/2023 09:27 (5), 02/04/2026 21:03 (19)
Complete: 🔍
Cache ID: 216::103

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