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Critical Vulnerability in Napture v1.3.0: Arbitrary Code Execution via Luau Bytecode Loading

Critical
face-hh published GHSA-fr8g-fqv6-jrpx Jun 21, 2024

Package

No package listed

Affected versions

< 1.3.0, > 1.2.0

Patched versions

1.3.1 and later

Description

Summary

A critical vulnerability in napture v1.3.0 allows Luau bytecode to be loaded by the interpreter, potentially leading to arbitrary code execution (ACE) without user interaction.

Impact

This vulnerability allows an attacker to execute arbitrary code on a remote host by exploiting type confusion and other vulnerabilities in the Luau bytecode execution.

Mitigation

A wrapper over T: AsChunk has been implemented to enforce ChunkMode::Text, preventing the interpreter from loading bytecode chunks.

Affected Versions

  • Napture v1.3.0

Credits

This vulnerability was reported by @wfrsk.

References

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
High
Privileges required
None
User interaction
None
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:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CVE ID

No known CVE

Weaknesses

Credits