Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, when serving files through Active Storage's proxy delivery mode, the proxy controller loads the entire requested byte range into memory before sending it. A request with a large or unbounded Range header (e.g. `bytes=0-`) could cause the server to allocate memory proportional to the file size, possibly resulting in a DoS vulnerability through memory exhaustion.
Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 3
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Rubyonrails Rails
cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
|
— |
7.2.3.1
|
|
Rubyonrails Rails
cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
|
8.0.0
|
8.0.4.1
|
|
Rubyonrails Rails
cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
|
8.1.0
|
8.1.2.1
|
References 7
https://github.com/rails/rails/commit/2cd933c366b777f873d4d590127da2f4a25e4ba5
security-advisories@github.com
https://github.com/rails/rails/commit/42012eaaa88dfc7d0030161b2bc8074a7bbce92a
security-advisories@github.com
https://github.com/rails/rails/commit/8159a9c3de3f27a2bcf2866b8bf9ceb9075e229b
security-advisories@github.com
https://github.com/rails/rails/releases/tag/v7.2.3.1
security-advisories@github.com
https://github.com/rails/rails/releases/tag/v8.0.4.1
security-advisories@github.com
https://github.com/rails/rails/releases/tag/v8.1.2.1
security-advisories@github.com
https://github.com/rails/rails/security/advisories/GHSA-r46p-8f7g-vvvg
security-advisories@github.com