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DDoS Attacks on 3G Network: Zero-Day HLR/AuC Threats and Exploits

The HLR/AuC is considered to be one of the most important network elements of a 3G network. It can serve up to five million subscribers and at least one transaction with HLR/AuC is required for every single phone call or data session. . This paper presents experimental results and observations that can be exploited to perform a novel distributed denial of service attack in 3G networks that targets the availability of the HLR/AuC. More specifically, first we present an experiment in which we identified and proved some zero-day vulnerabilities of the 3G network that can be exploited by malicious actors to mount various attacks. For the purpose of our experiment, we have used off-the-shelf infrastructure and software, without any specialized modification. Based on the observations of the experiment, we reveal an Advanced Persistent Threat (APT) in 3G networks that aims to flood an HLR/AuC of a mobile operator. We also prove that the discovered APT can be performed in a trivial manner using commodity hardware and software, which is widely and affordably available. The link for this article located at Schneier on Security is no longer available. . Test findings demonstrate methods to leverage flaws in 3G systems for DDoS strikes targeting HLR/AuC.. 3G Network Security,DDoS Attacks,HLR/AuC Vulnerabilities,Exploitation Techniques. . Dave Wreski

Feb 26, 2014 • Dave Wreski Network Security