CVE-2020-8162

A client side enforcement of server side security vulnerability exists in rails < 5.2.4.2 and rails < 6.0.3.1 ActiveStorage's S3 adapter that allows the Content-Length of a direct file upload to be modified by an end user bypassing upload limits.

Affected

https://github.com/rails/rails

CVSS v3.1 NVD

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v2.0 NVD

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:P/A:N

EPSS

3.03% chance of exploitation in the next 30 days, 87th percentile

Published

2020-06-19

Updated

2024-08-04

Proof-of-concept exploits (1)

• https://hackerone.com/reports/789579

Security advisories

• https://groups.google.com/g/rubyonrails-security/c/PjU3946mreQ
• https://www.debian.org/security/2020/dsa-4766
• advisories/GHSA-m42x-37p3-fv5w

References

• CVE Record
• NVD entry