Vulnerabilities / Threats

3/7/2018
12:24 PM
50%
50%

Memcached DDoS Attack: Kill Switch, New Details Disclosed

Corero shares a kill switch for the Memcached vulnerability and reports the flaw is more extensive than originally believed.

Corero Network Security has disclosed a "kill switch" for the Memcached vulnerability to national security agencies and shared new evidence indicating the flaw is more dangerous than previously believed. For the first time, threat actors have been exploiting unsecured Memcached servers to launch distributed denial-of-service (DDoS) attacks on target businesses.

Memcached is an open-source memory caching system that stores data in RAM to accelerate access times. It was not built for Internet access; users don't have to authenticate. This exploit lets attackers create spoof requests and boost attacks up to 50,000 times.

The attacks, which hit businesses including GitHub, started in late February. German DDoS mitigation service provider Link11 was among the first to report the new activity, which included UDP attacks using Memcached servers to spread. Link11 found 5,000 vulnerable Memcached servers on the public internet.

Corero researchers have discovered that any exposed Memcached server that can be leveraged for a DDoS attack can also be tricked into sharing user data it has cached from its local network or host. Because Memcached servers don't require authentication, anything added to a vulnerable server can be stolen. Attackers can also modify data and reinsert it in the cache without owners' knowledge.

The "kill switch" sends a command back to the attackers' server to suppress the current DDoS exploitation. This invalidates the cache of a vulnerable server, including attackers' potentially malicious payload. It has been effectively tested on live attacking servers, Corero reports.

Read more details here.

 

 

 

Black Hat Asia returns to Singapore with hands-on technical Trainings, cutting-edge Briefings, Arsenal open-source tool demonstrations, top-tier solutions and service providers in the Business Hall. Click for information on the conference and to register.

Dark Reading's Quick Hits delivers a brief synopsis and summary of the significance of breaking news events. For more information from the original source of the news item, please follow the link provided in this article. View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
Higher Education: 15 Books to Help Cybersecurity Pros Be Better
Curtis Franklin Jr., Senior Editor at Dark Reading,  12/12/2018
'PowerSnitch' Hacks Androids via Power Banks
Kelly Jackson Higgins, Executive Editor at Dark Reading,  12/8/2018
Worst Password Blunders of 2018 Hit Organizations East and West
Curtis Franklin Jr., Senior Editor at Dark Reading,  12/12/2018
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win a Starbucks Card! Click Here
Latest Comment: This comment is waiting for review by our moderators.
Current Issue
10 Best Practices That Could Reshape Your IT Security Department
This Dark Reading Tech Digest, explores ten best practices that could reshape IT security departments.
Flash Poll
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2018-14623
PUBLISHED: 2018-12-14
A SQL injection flaw was found in katello's errata-related API. An authenticated remote attacker can craft input data to force a malformed SQL query to the backend database, which will leak internal IDs. This is issue is related to an incomplete fix for CVE-2016-3072. Version 3.10 and older is vulne...
CVE-2018-18093
PUBLISHED: 2018-12-14
Improper file permissions in the installer for Intel VTune Amplifier 2018 Update 3 and before may allow unprivileged user to potentially gain privileged access via local access.
CVE-2018-18096
PUBLISHED: 2018-12-14
Improper memory handling in Intel QuickAssist Technology for Linux (all versions) may allow an authenticated user to potentially enable a denial of service via local access.
CVE-2018-18097
PUBLISHED: 2018-12-14
Improper directory permissions in Intel Solid State Drive Toolbox before 3.5.7 may allow an authenticated user to potentially enable escalation of privilege via local access.
CVE-2018-3704
PUBLISHED: 2018-12-14
Improper directory permissions in the installer for the Intel Parallel Studio before 2019 Gold may allow authenticated users to potentially enable an escalation of privilege via local access.