CVE-2024-45614
Header normalization allows for client to clobber proxy set headers in Puma
Severity Score
5.4
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
1
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Track
*SSVC
Descriptions
Puma is a Ruby/Rack web server built for parallelism. In affected versions clients could clobber values set by intermediate proxies (such as X-Forwarded-For) by providing a underscore version of the same header (X-Forwarded_For). Any users relying on proxy set variables is affected. v6.4.3/v5.6.9 now discards any headers using underscores if the non-underscore version also exists. Effectively, allowing the proxy defined headers to always win. Users are advised to upgrade. Nginx has a underscores_in_headers configuration variable to discard these headers at the proxy level as a mitigation. Any users that are implicitly trusting the proxy defined headers for security should immediately cease doing so until upgraded to the fixed versions.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:Track
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2024-09-02 CVE Reserved
- 2024-09-19 CVE Published
- 2024-09-20 CVE Updated
- 2024-09-27 EPSS Updated
- 2024-09-29 First Exploit
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-639: Authorization Bypass Through User-Controlled Key
CAPEC
References (3)
| URL | Tag | Source |
|---|---|---|
| https://github.com/puma/puma/security/advisories/GHSA-9hf4-67fc-4vf4 | X_refsource_confirm | |
| https://nginx.org/en/docs/http/ngx_http_core_module.html#underscores_in_headers | X_refsource_misc |
| URL | Date | SRC |
|---|---|---|
| https://github.com/ooooooo-q/puma_header_normalization-CVE-2024-45614 | 2024-09-29 |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Puma Search vendor "Puma" | Puma Search vendor "Puma" for product "Puma" | >= 6.0.0 < 6.4.3 Search vendor "Puma" for product "Puma" and version " >= 6.0.0 < 6.4.3" | en |
Affected
| ||||||
| Puma Search vendor "Puma" | Puma Search vendor "Puma" for product "Puma" | < 5.6.9 Search vendor "Puma" for product "Puma" and version " < 5.6.9" | en |
Affected
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