{"id":25829,"date":"2025-04-17T14:00:02","date_gmt":"2025-04-17T14:00:02","guid":{"rendered":""},"modified":"2025-08-08T23:47:50","modified_gmt":"2025-08-09T05:47:50","slug":"cve-2025-32743-critical-vulnerability-in-connman-could-lead-to-system-compromise","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-32743-critical-vulnerability-in-connman-could-lead-to-system-compromise\/","title":{"rendered":"CVE-2025-32743: Critical Vulnerability in ConnMan Could Lead to System Compromise<\/strong>"},"content":{"rendered":"

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

The cybersecurity landscape continually evolves, with new vulnerabilities discovered regularly. One such vulnerability, identified as CVE-2025-32743, poses a significant threat to systems running ConnMan versions up to 1.44. This critical vulnerability<\/a>, if exploited, allows attackers to cause a denial of service (DoS) or potentially execute arbitrary code. System administrators and security teams must pay close attention to this vulnerability<\/a> due to its high CVSS Severity Score of 9.0 and its potential to cause substantial damage, including system compromise, or data leakage.<\/p>\n

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

CVE ID: CVE-2025-32743
\nSeverity: Critical (9.0 CVSS Score)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: System compromise or data<\/a> leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

ConnMan | Up to 1.44<\/p>\n

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

This vulnerability occurs due<\/a> to improper handling of DNS responses with the Truncated (TC) bit set in ConnMan. When the lookup string in ns_resolv in dnsproxy.c is NULL or an empty string upon receiving a TC bit set DNS response, it triggers incorrect length calculations and incorrect memcpy operations. As a result, an attacker can exploit this flaw to crash the application or possibly execute arbitrary code<\/a>.<\/p>\n

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

Below is a conceptual example of how this vulnerability might be exploited<\/a>, using a crafted DNS response:<\/p>\n

#!\/bin\/bash\n# Example of a crafted DNS response\n# Create a DNS query\ndns_query=\"dig target.example.com\"\n# Send the DNS query and capture the response\ndns_response=`$dns_query`\n# Craft a DNS response with the TC bit set and an empty query string\ncrafted_response=${dns_response\/QUESTION:\\ 1,\\ ANSWER:\\ 0,\\ AUTHORITY:\\ 0,\\ ADDITIONAL:\\ 0\/QUESTION:\\ 0,\\ ANSWER:\\ 0,\\ AUTHORITY:\\ 0,\\ ADDITIONAL:\\ 0}\n# Send the crafted response to the target\necho $crafted_response > \/dev\/udp\/target.example.com\/53<\/code><\/pre>\n
This script first creates<\/a> a DNS query for ‘target.example.com. It then captures the response and crafts a new response with the TC bit set and an empty query string. The crafted response is then sent to the target, causing the application to crash or possibly allowing the attacker to execute arbitrary code<\/a>.
\nThe above code is conceptual and for educational purposes only. Misuse of this information can result in criminal charges.<\/p>\n
Mitigation<\/strong><\/p>\n
It’s crucial to apply the vendor patch as soon as possible to mitigate this vulnerability<\/a>. If the patch cannot be applied immediately, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary protection. It’s also recommended to regularly update all software and systems as part of a comprehensive cybersecurity<\/a> strategy. Regularly monitoring and auditing system logs for suspicious activity can also help identify potential<\/a> threats early.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The cybersecurity landscape continually evolves, with new vulnerabilities discovered regularly. One such vulnerability, identified as CVE-2025-32743, poses a significant threat to systems running ConnMan versions up to 1.44. This critical vulnerability, if exploited, allows attackers to cause a denial of service (DoS) or potentially execute arbitrary code. System administrators and security teams must pay […]<\/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":[87],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-25829","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-dos"],"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