{"id":60634,"date":"2025-08-07T12:17:44","date_gmt":"2025-08-07T12:17:44","guid":{"rendered":""},"modified":"2025-10-22T17:02:05","modified_gmt":"2025-10-22T23:02:05","slug":"cve-2025-50460-remote-code-execution-vulnerability-in-ms-swift-project","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-50460-remote-code-execution-vulnerability-in-ms-swift-project\/","title":{"rendered":"CVE-2025-50460: Remote Code Execution Vulnerability in ms-swift Project<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

In this blog post, we delve into a high-severity vulnerability, CVE-2025-50460, that exists in the ms-swift project version 3.3.0. The vulnerability is classified as a Remote Code Execution (RCE), one of the most dangerous forms of cybersecurity flaws. By exploiting this vulnerability, an attacker can compromise a system, leading to potential data leakage or full system<\/a> control. This vulnerability is particularly concerning because it can be exploited remotely, which means an attacker does not need physical access to the vulnerable system<\/a>.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-50460
\nSeverity: Critical (9.8 CVSS Score)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Potential system<\/a> compromise or data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

ms-swift | 3.3.0<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The vulnerability resides in the tests\/run.py file<\/a> of the ms-swift project. Specifically, it has to do with the unsafe deserialization of a YAML configuration file<\/a> using yaml.load() from the PyYAML library. If an attacker can control the content of the YAML configuration file passed to the –run_config parameter, they can execute arbitrary code<\/a> during deserialization. The vulnerability is triggered when a malicious YAML file<\/a> is loaded, which allows the execution of arbitrary Python commands such as os.system(), leading to full system compromise.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Below is a conceptual example of the malicious payload that could be used to exploit this vulnerability<\/a>:<\/p>\n

# Load malicious YAML file\nwith open(\"malicious.yaml\", \"r\") as file:\ndata = yaml.load(file)\n# Malicious YAML content\n\"\"\"\n!!python\/object\/apply:os.system ['cat \/etc\/passwd > \/tmp\/passwords.txt']\n\"\"\"<\/code><\/pre>\n
In this example, the malicious YAML file contains a Python os.system() command that exports the content of the \/etc\/passwd file<\/a> (which contains user account details) to a file named passwords.txt in the \/tmp directory. This is just a simple example; an attacker could execute any command that the system permissions allow<\/a>.<\/p>\n
Mitigation Guidance<\/strong><\/p>\n
The best way to mitigate this vulnerability is to upgrade the PyYAML library to version<\/a> 5.4 or higher and replace yaml.load() with yaml.safe_load() in the tests\/run.py script. This will prevent arbitrary code execution<\/a> during YAML deserialization. As a temporary measure until the patch can be applied, it is recommended to use a Web Application Firewall (WAF) or intrusion detection system (IDS) to detect and block any attempts to exploit this vulnerability<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview In this blog post, we delve into a high-severity vulnerability, CVE-2025-50460, that exists in the ms-swift project version 3.3.0. The vulnerability is classified as a Remote Code Execution (RCE), one of the most dangerous forms of cybersecurity flaws. By exploiting this vulnerability, an attacker can compromise a system, leading to potential data leakage or […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-60634","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-rce"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t