{"id":56752,"date":"2025-07-03T05:10:34","date_gmt":"2025-07-03T05:10:34","guid":{"rendered":""},"modified":"2025-08-07T17:19:43","modified_gmt":"2025-08-07T23:19:43","slug":"cve-2025-6733-critical-buffer-overflow-vulnerability-in-utt-hiper-840g","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-6733-critical-buffer-overflow-vulnerability-in-utt-hiper-840g\/","title":{"rendered":"CVE-2025-6733: Critical Buffer Overflow Vulnerability in UTT HiPER 840G<\/strong>"},"content":{"rendered":"

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

In the cybersecurity landscape, the discovery of a new vulnerability always raises concerns. A recent one that has caught attention is CVE-2025-6733, a critical buffer overflow vulnerability found in UTT HiPER 840G up to version 3.1.1-190328. This vulnerability affects the API component of the device<\/a>, particularly the function sub_416928 of the file \/goform\/formConfigDnsFilterGlobal. The manipulation of the argument GroupName can lead to a buffer overflow, which could potentially cause severe damage to the integrity of the system<\/a>.
\nThis vulnerability is of significant concern due to its severity<\/a> and the fact that the exploit has been publicly disclosed. This means that potential attackers are aware of the vulnerability<\/a> and can exploit it. The vendor was notified about this issue, but they haven’t responded yet, heightening the risk.<\/p>\n

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

CVE ID: CVE-2025-6733
\nSeverity: Critical – CVSS Score: 8.8
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Potential system compromise and data<\/a> leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

UTT HiPER<\/a> 840G | Up to 3.1.1-190328<\/p>\n

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

The vulnerability resides within the function sub_416928 of the file<\/a> \/goform\/formConfigDnsFilterGlobal. When a remote attacker sends specially crafted input to the GroupName argument of this function, it triggers a buffer overflow<\/a>. This overflow can cause the system’s memory to be overwritten, potentially leading to arbitrary code execution<\/a>, system crashes, and data leakage.<\/p>\n

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

Here’s a conceptual example of how the vulnerability might be exploited. Note that this is for illustrative purposes only:<\/p>\n

POST \/goform\/formConfigDnsFilterGlobal HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ \"GroupName\": \"A\"*10000 }<\/code><\/pre>\n
In this example, the GroupName argument is filled with a string of ‘A’ characters that exceed the buffer’s capacity, leading to overflow<\/a>.<\/p>\n
Mitigation Guidance<\/strong><\/p>\n
To mitigate the risk posed by this vulnerability<\/a>, users are advised to apply the vendor patch as soon as it\u2019s available. Until then, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be employed as temporary mitigation measures. These systems can help detect and prevent potential<\/a> exploit attempts.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview In the cybersecurity landscape, the discovery of a new vulnerability always raises concerns. A recent one that has caught attention is CVE-2025-6733, a critical buffer overflow vulnerability found in UTT HiPER 840G up to version 3.1.1-190328. This vulnerability affects the API component of the device, particularly the function sub_416928 of the file \/goform\/formConfigDnsFilterGlobal. The […]<\/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":[86,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-56752","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow","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