GHSA-m42x-37p3-fv5w
Suggest an improvement- Source
- https://github.com/advisories/GHSA-m42x-37p3-fv5w
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/05/GHSA-m42x-37p3-fv5w/GHSA-m42x-37p3-fv5w.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-m42x-37p3-fv5w
- Aliases
- Published
- 2020-05-26T15:09:48Z
- Modified
- 2024-02-22T05:37:26.373913Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
- Summary
- Circumvention of file size limits in ActiveStorage
- Details
-
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.
- References
-
- https://nvd.nist.gov/vuln/detail/CVE-2020-8162
- https://github.com/aws/aws-sdk-ruby/issues/2098
- https://hackerone.com/reports/789579
- https://github.com/aws/aws-sdk-ruby
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activestorage/CVE-2020-8162.yml
- https://groups.google.com/forum/#!topic/rubyonrails-security/PjU3946mreQ
- https://groups.google.com/g/rubyonrails-security/c/PjU3946mreQ
- https://www.debian.org/security/2020/dsa-4766
Affected packages
RubyGems / activestorage
Package
- Name
- activestorage
- Purl
- pkg:gem/activestorage
RubyGems / activestorage
Package
- Name
- activestorage
- Purl
- pkg:gem/activestorage