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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.03%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 3.03% probability · 87th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-602, CWE-434
- Affected
- rubyonrails/rails · debian/debian linux
- Source
- support@hackerone.com
References
- https://groups.google.com/g/rubyonrails-security/c/PjU3946mreQMailing List, Patch, Third Party Advisory
- https://hackerone.com/reports/789579Exploit, Third Party Advisory
- https://www.debian.org/security/2020/dsa-4766Third Party Advisory
- https://groups.google.com/g/rubyonrails-security/c/PjU3946mreQMailing List, Patch, Third Party Advisory
- https://hackerone.com/reports/789579Exploit, Third Party Advisory
- https://www.debian.org/security/2020/dsa-4766Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.