{"id":86088,"date":"2025-12-20T19:36:36","date_gmt":"2025-12-20T19:36:36","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T00:00:00","slug":"cve-2023-39296-prototype-pollution-vulnerability-in-qnap-operating-systems","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2023-39296-prototype-pollution-vulnerability-in-qnap-operating-systems\/","title":{"rendered":"CVE-2023-39296: Prototype Pollution Vulnerability in QNAP Operating Systems<\/strong>"},"content":{"rendered":"

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

The vulnerability identified as CVE-2023-39296 is a Prototype Pollution vulnerability that affects multiple versions of the QNAP Operating System. This security flaw has the potential to compromise system integrity or lead to data leakage if successfully exploited, thus posing a significant risk to users’ data and privacy.<\/p>\n

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

CVE ID: CVE-2023-39296
\nSeverity: High (7.5 CVSS Score)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Potential system compromise or data leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

QTS | All versions prior to 5.1.3.2578 build 20231110
\nQuTS hero | All versions prior to h5.1.3.2578 build 20231110<\/p>\n

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

The exploit takes advantage of a Prototype Pollution vulnerability in the QNAP Operating Systems. Prototype Pollution refers to the ability to modify a JavaScript object prototype. When this occurs, properties that are meant to be present on all objects become overwritten or polluted, hence the name. In this case, the exploit allows users to override existing attributes with incompatible types. If an attribute is overridden with an incompatible type, it can cause the system to crash.<\/p>\n

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

Below is a conceptual example of how the vulnerability might be exploited, demonstrated through a JSON payload. This payload could be sent to a vulnerable endpoint, causing the prototype to be polluted and potentially leading to a system crash.<\/p>\n

POST \/vulnerable\/endpoint HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ \"__proto__\": { \"polluted\": \"Prototype Polluted!\" } }<\/code><\/pre>\n
This payload would add a property “polluted” to all objects, demonstrating the Prototype Pollution vulnerability.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The vulnerability identified as CVE-2023-39296 is a Prototype Pollution vulnerability that affects multiple versions of the QNAP Operating System. This security flaw has the potential to compromise system integrity or lead to data leakage if successfully exploited, thus posing a significant risk to users’ data and privacy. Vulnerability Summary CVE ID: CVE-2023-39296 Severity: High […]<\/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":[],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-86088","post","type-post","status-publish","format-standard","hentry"],"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