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Ubuntu.comUB:CVE-2021-32804
HistoryAug 03, 2021 - 12:00 a.m.

CVE-2021-32804

2021-08-0300:00:00
ubuntu.com
ubuntu.com
11

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

5.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:P/A:P

0.012 Low

EPSS

Percentile

84.6%

The npm package โ€œtarโ€ (aka node-tar) before versions 6.1.1, 5.0.6, 4.4.14,
and 3.3.2 has a arbitrary File Creation/Overwrite vulnerability due to
insufficient absolute path sanitization. node-tar aims to prevent
extraction of absolute file paths by turning absolute paths into relative
paths when the preservePaths flag is not set to true. This is achieved
by stripping the absolute path root from any absolute file paths contained
in a tar file. For example /home/user/.bashrc would turn into
home/user/.bashrc. This logic was insufficient when file paths contained
repeated path roots such as ////home/user/.bashrc. node-tar would only
strip a single path root from such paths. When given an absolute file path
with repeating path roots, the resulting path (e.g. ///home/user/.bashrc)
would still resolve to an absolute path, thus allowing arbitrary file
creation and overwrite. This issue was addressed in releases 3.2.2, 4.4.14,
5.0.6 and 6.1.1. Users may work around this vulnerability without upgrading
by creating a custom onentry method which sanitizes the entry.path or a
filter method which removes entries with absolute paths. See referenced
GitHub Advisory for details. Be aware of CVE-2021-32803 which fixes a
similar bug in later versions of tar.

Use Vulners API to create your own security tool

API usage cases
  • Network scanning
  • Linux Patch management
  • Threat protection
  • No network audit solution

Ways of integration

Integrate Vulners API

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

5.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:P/A:P

0.012 Low

EPSS

Percentile

84.6%

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