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Inadequate validation of retrieved subdomains may lead to a Remote Code Execution (RCE)

Critical
six2dez published GHSA-fxwr-vr9x-wvjp Oct 19, 2023

Package

reconftw (Bash)

Affected versions

< v2.7.1

Patched versions

v2.7.1.1

Description

Vulnerable Versions

reconftw prior to v2.7.1

Patched Versions

reconftw v2.7.1.1 and higher

Description

A critical vulnerability has been identified in reconftw where inadequate validation of retrieved subdomains may lead to a Remote Code Execution (RCE) attack. An attacker can exploit this vulnerability by crafting a malicious CSP entry on it's own domain. Successful exploitation can lead to the execution of arbitrary code within the context of the application, potentially compromising the system.

Acknowledgements

I would like to thank Jaggar Henry and Felix Segoviano for responsibly disclosing this vulnerability.

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CVE ID

CVE-2023-46117

Weaknesses