Description
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, Active Storage's `DiskService#path_for` does not validate that the resolved filesystem path remains within the storage root directory. If a blob key containing path traversal sequences (e.g. `../`) is used, it could allow reading, writing, or deleting arbitrary files on the server. Blob keys are expected to be trusted strings, but some applications could be passing user input as keys and would be affected. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.
CVSS breakdown
CVSS 4.0
Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality (Vulnerable System)
High
Integrity (Vulnerable System)
High
Availability (Vulnerable System)
None
Confidentiality (Subsequent System)
None
Integrity (Subsequent System)
None
Availability (Subsequent System)
None
E
Unchanged
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Affected products
- rails / activestorage>= 8.1.0.beta1, < 8.1.2.1 – >= 8.1.0.beta1, < 8.1.2.1
- rails / activestorage>= 8.0.0.beta1, < 8.0.4.1 – >= 8.0.0.beta1, < 8.0.4.1
- rails / activestorage< 7.2.3.1 – < 7.2.3.1
- rubyonrails / rails7.2.3.1
References
- VENDOR_ADVISORYhttps://github.com/rails/rails/security/advisories/GHSA-9xrj-h377-fr87
- PATCHhttps://github.com/rails/rails/commit/4933c1e3b8c1bb04925d60347be9f69270392f2c
- PATCHhttps://github.com/rails/rails/commit/9b06fbc0f504b8afe333f33d19548f3b85fbe655
- PATCHhttps://github.com/rails/rails/commit/a290c8a1ec189d793aa6d7f2570b6a763f675348
- PATCHhttps://github.com/rails/rails/releases/tag/v7.2.3.1
- PATCHhttps://github.com/rails/rails/releases/tag/v8.0.4.1
- PATCHhttps://github.com/rails/rails/releases/tag/v8.1.2.1
Updated 21m ago · 8 sources