Unrestricted Attachment Upload

Description

Impact

InvenTree allows unrestricted upload of files as attachments to various database fields. Potentially dangerous files (such as HTML files containing malicious javascript) can be uploaded, and (when opened by the user) run the malicious code directly in the users browser.

image

Note that the upload of malicious files must be performed by an authenticated user account

Solution

The solution for this vulnerability is to ensure that attachment files are downloaded to the local machine before opening, rather than opening the file in the current browser context.

Patches

  • The issue is addressed in the upcoming 0.8.0 release
  • This fix will also be back-ported to the 0.7.x branch, applied to the 0.7.2 release

Workarounds

Users can alleviate risk of opening malicious files by right-clicking on the attachment link and selecting "Save link as"

image

This minimizes risk (e.g. of XSS attacks) by opening the HTML file from the users computer

References

https://huntr.dev/bounties/a0e5c68e-0f75-499b-bd7b-d935fb8c0cd1/

For more information

If you have any questions or comments about this advisory:

Basic information

Type
reviewed
Severity
high
Advisory on GitHub
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Repository advisory
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Source code
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Published (advisory)
2022-06-17 01:16:55 UTC
Updated
2023-01-27 05:04:20 UTC
GitHub reviewed
2022-06-17 01:16:55 UTC
NVD published
2022-06-17

EPSS Score

Score Percentile
0.36% 57.50%

CVSS Scores

Base score Version Severity Vector
8.8 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.

Identifiers

CWEs

CWE id Name
CWE-434 Unrestricted Upload of File with Dangerous Type

Credits

  • saharshtapi (analyst)

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
pip inventree < 0.7.2 0.7.2

References

cvelogic Threat Intelligence