CGI Script Vulnerability in GoAhead Web Server by Embedthis
CVE-2021-42342

9.8CRITICAL

Key Information:

Vendor

Embedthis

Status
Goahead
Vendor
CVE Published:
14 October 2021

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 77%

What is CVE-2021-42342?

An identified issue in the GoAhead web server versions 4.x and 5.x prior to 5.1.5 allows user form variables to be passed to CGI scripts without proper prefixing. This oversight enables attackers to tunnel untrusted environment variables into affected CGI scripts, potentially leading to unauthorized access and exploitation of the server's functionality.

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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-2021-42342
Created by Mr-xn

goahead-webserver-pre-5.1.5-RCE-PoC-CVE-2021-42342-
Created by kimusan

References

https://github.com/embedthis/goahead/issues/305
x_refsource_MISC

EPSS Score

77% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
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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