CVE-2020-8162 – activestorage

Package

Manager: gem
Name: activestorage
Vulnerable Version: >=5.0.0 <5.2.4.3 || >=6.0.0 <6.0.3.1

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

EPSS: 0.01549 pctl0.80726

Details

Circumvention of file size limits in ActiveStorage There is a vulnerability in ActiveStorage's S3 adapter that allows the Content-Length of a direct file upload to be modified by an end user. Versions Affected: rails < 5.2.4.2, rails < 6.0.3.1 Not affected: Applications that do not use the direct upload functionality of the ActiveStorage S3 adapter. Fixed Versions: rails >= 5.2.4.3, rails >= 6.0.3.1 Impact ------ Utilizing this vulnerability, an attacker can control the Content-Length of an S3 direct upload URL without receiving a new signature from the server. This could be used to bypass controls in place on the server to limit upload size. Workarounds ----------- This is a low-severity security issue. As such, no workaround is necessarily until such time as the application can be upgraded.

Metadata

Created: 2020-05-26T15:09:48Z
Modified: 2023-07-05T19:19:29Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/05/GHSA-m42x-37p3-fv5w/GHSA-m42x-37p3-fv5w.json
CWE IDs: ["CWE-434", "CWE-602"]
Alternative ID: GHSA-m42x-37p3-fv5w
Finding: F027
Auto approve: 1