HTTP Request Smuggling Vulnerability in Ruby's WEBrick Server
CVE-2020-25613

7.5HIGH

Key Information:

Vendor

Ruby-lang

Status
Ruby
Webrick
Vendor
CVE Published:
6 October 2020

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2020-25613?

A flaw in Ruby's bundled WEBrick HTTP server allowed inadequate validation of the transfer-encoding header. This oversight may be exploited by attackers to evade reverse proxy security measures, potentially facilitating HTTP request smuggling, which could lead to unauthorized access or malicious actions across web applications. Developers using affected Ruby versions are encouraged to update to mitigate potential security risks.

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Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2020-25613
Created by metapox

References

https://hackerone.com/reports/965267
https://www.ruby-lang.org/en/news/2020/09/29/http-request...
https://github.com/ruby/webrick/commit/8946bb38b4d87549f0...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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