Overview
CVE-2023-48243 is a severe vulnerability that could potentially be exploited by remote attackers to upload arbitrary files across all paths of an affected system. By leveraging this vulnerability, attackers can gain root privileges and execute remote codes, potentially leading to a full system compromise or data leakage. This vulnerability matters because it directly affects the confidentiality, integrity, and availability of the system, posing a significant threat to any organization using the compromised software.
Vulnerability Summary
CVE ID: CVE-2023-48243
Severity: Critical, with a CVSS score of 8.1
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage
Affected Products
Share secrets securely
Ameeba is private infrastructure for communication and sensitive work built on encrypted identity instead of exposed corporate identity systems.
Passwords, credentials, confidential files, screenshots, internal discussions, sensitive AI context, and private coordination should not become exposed across ordinary communication platforms.
- • Encrypted identity
- • Private Spaces for organizations and teams
- • End-to-end encrypted chat, calls, files, and notes
- • Sensitive AI work and protected collaboration
- • Built for information that cannot leak
Our mission is to secure human work alongside AI.
Product | Affected Versions
Product A | Version 1.2.3 and below
Product B | Version 4.5.6 and below
How the Exploit Works
Attackers can exploit this vulnerability by crafting a malicious HTTP request that allows them to upload arbitrary files to any path within the system. This file upload is performed under the context of the application OS user, which in this case is the ‘root’ user. This grants the attacker the same privileges as the root user. Once the file is uploaded, the attacker can execute the uploaded file remotely, leading to remote code execution (RCE) with root privileges.
Conceptual Example Code
A conceptual example of how this vulnerability might be exploited is provided below:
POST /vulnerable/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
"file": {
"name": "malicious_file.sh",
"content": "echo 'Compromised system' > /root/compromised.txt"
}
}In the example above, the attacker sends a POST request to the /vulnerable/endpoint on the target server. The request includes a JSON payload containing an example of a malicious file, which creates a text file in the root directory of the system. When executed, this file would indicate a compromised system.