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 tha
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.
- Published
- Jun 19, 2020
- Updated
- Jun 16, 2026
- EPSS
- 3.0% · 87th percentile
- CWE
- CWE-602
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Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 3.0%
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| rubyonrails | rails | cpe:2.3:a:rubyonrails:rails |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux10.0
- rubyonrails railsbefore 5.2.4.2
- rubyonrails rails6.0.0 and later · before 6.0.3.1
Versions reported by the vendor
Affected version ranges reported by the assigning authority (hackerone). Independent of NVD's CPE analysis and usually ahead of it.
n/a https://github.com/rails/rails
- rails >= 5.2.4.3, rails >= 6.0.3.1affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:10 | rails | before 2:5.2.2.1+dfsg-1+deb10u2 | 2:5.2.2.1+dfsg-1+deb10u2 |
| Debian:12 | rails | before 2:5.2.4.3+dfsg-1 | 2:5.2.4.3+dfsg-1 |
| openSUSE:Tumbleweed | rubygem-activestorage-6.0 | before 6.0.4.4-1.1 | 6.0.4.4-1.1 |
| Red Hat:satellite_capsule:6.9::el7 | ansible-collection-redhat-satellite | before 0:2.0.1-1.el7sat | 0:2.0.1-1.el7sat |
| Red Hat:satellite_capsule:6.9::el7 | ansible-runner | before 0:1.4.6-1.el7ar | 0:1.4.6-1.el7ar |
| Red Hat:satellite_capsule:6.9::el7 | ansiblerole-foreman_scap_client | before 0:0.1.0-1.el7sat | 0:0.1.0-1.el7sat |
| Red Hat:satellite_capsule:6.9::el7 | ansiblerole-insights-client | before 0:1.7.1-1.el7sat | 0:1.7.1-1.el7sat |
| Red Hat:satellite_capsule:6.9::el7 | ansiblerole-satellite-receptor-installer | before 0:0.6.13-1.el7sat | 0:0.6.13-1.el7sat |
| Red Hat:satellite_capsule:6.9::el7 | crane-selinux | before 0:3.5.1-1.el7sat | 0:3.5.1-1.el7sat |
| Red Hat:satellite_capsule:6.9::el7 | createrepo_c | before 0:0.17.1-1.el7pc | 0:0.17.1-1.el7pc |
| Red Hat:satellite_capsule:6.9::el7 | createrepo_c-debuginfo | before 0:0.17.1-1.el7pc | 0:0.17.1-1.el7pc |
| Red Hat:satellite_capsule:6.9::el7 | createrepo_c-libs | before 0:0.17.1-1.el7pc | 0:0.17.1-1.el7pc |
| Red Hat:satellite_capsule:6.9::el7 | foreman | before 0:2.3.1.20-1.el7sat | 0:2.3.1.20-1.el7sat |
| Red Hat:satellite_capsule:6.9::el7 | foreman-bootloaders-redhat | before 0:202005201200-1.el7sat | 0:202005201200-1.el7sat |
| Red Hat:satellite_capsule:6.9::el7 | foreman-bootloaders-redhat-tftpboot | before 0:202005201200-1.el7sat | 0:202005201200-1.el7sat |
| Red Hat:satellite_capsule:6.9::el7 | foreman-debug | before 0:2.3.1.20-1.el7sat | 0:2.3.1.20-1.el7sat |
| Red Hat:satellite_capsule:6.9::el7 | foreman-discovery-image | before 1:3.7.4-2.el7sat | 1:3.7.4-2.el7sat |
| Red Hat:satellite_capsule:6.9::el7 | foreman-discovery-image-service | before 0:1.0.0-4.el7sat | 0:1.0.0-4.el7sat |
| Red Hat:satellite_capsule:6.9::el7 | foreman-discovery-image-service-tui | before 0:1.0.0-4.el7sat | 0:1.0.0-4.el7sat |
| Red Hat:satellite_capsule:6.9::el7 | foreman-installer | before 1:2.3.1.10-1.el7sat | 1:2.3.1.10-1.el7sat |
| Red Hat:satellite_capsule:6.9::el7 | foreman-installer-katello | before 1:2.3.1.10-1.el7sat | 1:2.3.1.10-1.el7sat |
| Red Hat:satellite_capsule:6.9::el7 | foreman-proxy | before 0:2.3.1-1.el7sat | 0:2.3.1-1.el7sat |
| Red Hat:satellite_capsule:6.9::el7 | foreman-proxy-content | before 0:3.18.1-3.el7sat | 0:3.18.1-3.el7sat |
| Red Hat:satellite_capsule:6.9::el7 | foreman-proxy-journald | before 0:2.3.1-1.el7sat | 0:2.3.1-1.el7sat |
+96
Same product
rubyonrails: all recordsOther highest-scoring records for the same primary product.
- CVE-2019-5418There is a File Content Disclosure vulnerability in Action View <5.2.2.1, <5.1.6.2, <5.0.7.2, <4.2.11.1 and v3 where specially crafted accepKEV90Now
- CVE-2016-0752Directory traversal vulnerability in Action View in Ruby on Rails before 3.2.22.1, 4.0.x and 4.1.x before 4.1.14.1, 4.2.x before 4.2.5.1, anKEV89Now
- CVE-2019-5420A remote code execution vulnerability in development mode Rails <5.2.2.1, <6.0.0.beta3 can allow an attacker to guess the automatically gene66This week
- CVE-2020-8163The is a code injection vulnerability in versions of Rails prior to 5.0.1 that wouldallow an attacker who controlled the `locals` argument o60This week
- CVE-2013-0156active_support/core_ext/hash/conversions.rb in Ruby on Rails before 2.3.15, 3.0.x before 3.0.19, 3.1.x before 3.1.10, and 3.2.x before 3.2.160This week
- CVE-2013-0333lib/active_support/json/backends/yaml.rb in Ruby on Rails 2.3.x before 2.3.16 and 3.0.x before 3.0.20 does not properly convert JSON data to59Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:rails | 2:5.2.4.3+dfsg-1 · Debian:12 | Package registry (OSV) |
| opensuse:rubygem-activestorage-6.0 | 6.0.4.4-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:ansible-collection-redhat-satellite | 0:2.0.1-1.el7sat · Red Hat:satellite_capsule:6.9::el7 | Package registry (OSV) |
| red hat:ansible-runner | 0:1.4.6-1.el7ar · Red Hat:satellite_capsule:6.9::el7 | Package registry (OSV) |
| red hat:ansiblerole-foreman_scap_client | 0:0.1.0-1.el7sat · Red Hat:satellite_capsule:6.9::el7 | Package registry (OSV) |
| red hat:ansiblerole-insights-client | 0:1.7.1-1.el7sat · Red Hat:satellite_capsule:6.9::el7 | Package registry (OSV) |
| red hat:ansiblerole-satellite-receptor-installer | 0:0.6.13-1.el7sat · Red Hat:satellite_capsule:6.9::el7 | Package registry (OSV) |
| red hat:crane-selinux | 0:3.5.1-1.el7sat · Red Hat:satellite_capsule:6.9::el7 | Package registry (OSV) |
| red hat:createrepo_c | 0:0.17.1-1.el7pc · Red Hat:satellite_capsule:6.9::el7 | Package registry (OSV) |
| red hat:createrepo_c-debuginfo | 0:0.17.1-1.el7pc · Red Hat:satellite_capsule:6.9::el7 | Package registry (OSV) |
| red hat:createrepo_c-libs | 0:0.17.1-1.el7pc · Red Hat:satellite_capsule:6.9::el7 | Package registry (OSV) |
| red hat:foreman | 0:2.3.1.20-1.el7sat · Red Hat:satellite_capsule:6.9::el7 | Package registry (OSV) |
| red hat:foreman-bootloaders-redhat | 0:202005201200-1.el7sat · Red Hat:satellite_capsule:6.9::el7 | Package registry (OSV) |
| red hat:foreman-bootloaders-redhat-tftpboot | 0:202005201200-1.el7sat · Red Hat:satellite_capsule:6.9::el7 | Package registry (OSV) |
| RubyGems:activestorage | 5.2.4.3 | Package registry (OSV) |
| RubyGems:activestorage | 6.0.3.1 | Package registry (OSV) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Proof-of-concept repository on GitHub ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | stars:0 | 2020-04-05 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- First PoC-76 d
- Published
- TodayOct 2, 2026+2296 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-20-385 · May 27, 2020(Ruby Güvenlik Güncellemesi)
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- high · data or configuration can be modified
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- High
- Availability impact
- None
Weakness class (CWE)
CWE-602 · Client-Side Enforcement of Server-Side SecurityCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Manipulating Hidden FieldsCAPEC-162High
- Create Malicious ClientCAPEC-202Medium
- Removing Important Client FunctionalityCAPEC-207likelihood: Medium · High
- Removing/short-circuiting 'Purse' logic: removing/mutating 'cash' decrementsCAPEC-208Medium
- Exploitation of Trusted IdentifiersCAPEC-21likelihood: High · High
- Accessing/Intercepting/Modifying HTTP CookiesCAPEC-31likelihood: High · High
- Harvesting Information via API Event MonitoringCAPEC-383Low
- Application API Message Manipulation via Man-in-the-MiddleCAPEC-384Low
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.