Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Network Security

12/23/2019
12:00 PM
Larry Loeb
Larry Loeb
Larry Loeb
50%
50%

5G Security Rests on an Unstable Base

Positive Technologies has issued a report on the emerging security problems of 5G signaling networks.

Positive Technologies has issued a report on the emerging security problems of 5G signaling networks titled "5G Signaling Networks: Blast From the Past." The title is descriptive of the central thesis of the report, that backwards compatibility will allow the security mistakes of the past to be carried forward into the next generation of mobile usage.

They point out that some of these older threats are quite well known: security researchers have long been discussing vulnerabilities in 2G and 3G networks. Older solutions in use may no longer be valid. For example, traditional two-factor authentication by SMS is no longer recommended for securing critical services.

But a new factor has emerged: the Internet of Things (IoT). The GSMA industry group expects IoT connections to grow from 9.1 billion this year to 25.2 billion in 2025.

One of the underlying problems in 5G signaling is that it continues to rely on Signaling System 7 (SS7). SS7 was designed for a totally different threat model when only fixed-line operators had access to the network. Security was an afterthought.

PT has already issued a report on SS7. It found that SS7 has architectural flaws that allow executing a whole range of attacks, including eavesdropping, SMS interception and fraud.

But SS7 interoperability will remain a 5G parameter for the foreseeable future. PT sums up the reasons for this fairly well: "According to GSMA estimates,1 the user base of 4G/5G subscribers is only starting to approach that of 2G/3G users. The number of 3G users is unlikely to decline significantly until at least 2025. But even at that time SS7 networks will continue to be relevant, since 2G/3G users are projected to account for a quarter of all subscribers (not counting IoT devices)."

4G networks may use the differing Diameter protocol instead of SS7. But they still must interconnect with previous-generation networks. So in practice, these networks, too, are vulnerable to some SS7 attacks.

Today's 5G networks have a non-standalone architecture. They rely on a 4G LTE core network (EPC). This allows improving the bandwidth and latency of user data with a 5G base station connected to existing 4G infrastructure. But any 5G devices while connecting to 5G frequencies for data transmission, will still rely on 4G and even 2G/3G networks for voice calls and SMS messaging.

According to ENISA, more than 80% of the telecom providers have declared having security incidents. To mitigate these, existing security best practices must be followed. Only 30% of operators in the EU have implemented them. In developing countries, fewer than 0.5% have done so.

Though 5G standards are evolving, it is necessary for all stakeholders to be present at their design phase. Only then can security considerations be brought to the forefront, as they should be.

— Larry Loeb has written for many of the last century's major "dead tree" computer magazines, having been, among other things, a consulting editor for BYTE magazine and senior editor for the launch of WebWeek.

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Current Issue
Special Report: Computing's New Normal, a Dark Reading Perspective
This special report examines how IT security organizations have adapted to the "new normal" of computing and what the long-term effects will be. Read it and get a unique set of perspectives on issues ranging from new threats & vulnerabilities as a result of remote working to how enterprise security strategy will be affected long term.
Flash Poll
The Threat from the Internetand What Your Organization Can Do About It
The Threat from the Internetand What Your Organization Can Do About It
This report describes some of the latest attacks and threats emanating from the Internet, as well as advice and tips on how your organization can mitigate those threats before they affect your business. Download it today!
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-11583
PUBLISHED: 2020-08-03
A GET-based XSS reflected vulnerability in Plesk Obsidian 18.0.17 allows remote unauthenticated users to inject arbitrary JavaScript, HTML, or CSS via a GET parameter.
CVE-2020-11584
PUBLISHED: 2020-08-03
A GET-based XSS reflected vulnerability in Plesk Onyx 17.8.11 allows remote unauthenticated users to inject arbitrary JavaScript, HTML, or CSS via a GET parameter.
CVE-2020-5770
PUBLISHED: 2020-08-03
Cross-site request forgery in Teltonika firmware TRB2_R_00.02.04.01 allows a remote attacker to perform sensitive application actions by tricking legitimate users into clicking a crafted link.
CVE-2020-5771
PUBLISHED: 2020-08-03
Improper Input Validation in Teltonika firmware TRB2_R_00.02.04.01 allows a remote, authenticated attacker to gain root privileges by uploading a malicious backup archive.
CVE-2020-5772
PUBLISHED: 2020-08-03
Improper Input Validation in Teltonika firmware TRB2_R_00.02.04.01 allows a remote, authenticated attacker to gain root privileges by uploading a malicious package file.