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.

Vulnerabilities / Threats

5/13/2019
06:15 PM
50%
50%

Thrangrycat Claws Cisco Customer Security

A linked pair of vulnerabilities could allow an attacker to take over many different types of Cisco networking components.

A recently discovered flaw in Cisco IOS XE software with the HTTP Server feature enabled could allow a user with stolen credentials to execute code on a Cisco networking device with root privileges — a significant privilege escalation attack. Dubbed Thrangrycat by the researchers at Red Balloon Security who discovered the linked pair of vulnerabilities, these flaws, designated CVE-2019-1862, would allow an attacker to first bypass the Cisco Trust Anchor module (TAm), then conduct a remote code injection with root execution.

In the first exploit, an attacker would manipulate the bitstream responsible for defining the Field-Programmable Gate Array (FPGA) that holds the code for TAm — code that executes from the FPGA hardware at boot and is designed to insulate the device from boot-time exploits. In addition to bypassing secure boot, the attack code locks all future software updates out of the TAm.

Once the TAm is compromised, the attacker can log into the device and execute code at root privilege. Cisco has released a firmware update that patches the vulnerability, and acknowledges that there are no operational work-arounds to Thrangrycat.

The company plans to present details of the vulnerability and exploit at Black Hat USA 2019 in Las Vegas.

For more, read here and here

 

 

 

Join Dark Reading LIVE for two cybersecurity summits at Interop 2019. Learn from the industry's most knowledgeable IT security experts. Check out the Interop agenda here.

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
COVID-19: Latest Security News & Commentary
Dark Reading Staff 4/7/2020
The Coronavirus & Cybersecurity: 3 Areas of Exploitation
Robert R. Ackerman Jr., Founder & Managing Director, Allegis Capital,  4/7/2020
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
6 Emerging Cyber Threats That Enterprises Face in 2020
This Tech Digest gives an in-depth look at six emerging cyber threats that enterprises could face in 2020. Download your copy today!
Flash Poll
State of Cybersecurity Incident Response
State of Cybersecurity Incident Response
Data breaches and regulations have forced organizations to pay closer attention to the security incident response function. However, security leaders may be overestimating their ability to detect and respond to security incidents. Read this report to find out more.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-11655
PUBLISHED: 2020-04-09
SQLite through 3.31.1 allows attackers to cause a denial of service (segmentation fault) via a malformed window-function query because the AggInfo object's initialization is mishandled.
CVE-2020-11656
PUBLISHED: 2020-04-09
In SQLite through 3.31.1, the ALTER TABLE implementation has a use-after-free, as demonstrated by an ORDER BY clause that belongs to a compound SELECT statement.
CVE-2019-20637
PUBLISHED: 2020-04-08
An issue was discovered in Varnish Cache before 6.0.5 LTS, 6.1.x and 6.2.x before 6.2.2, and 6.3.x before 6.3.1. It does not clear a pointer between the handling of one client request and the next request within the same connection. This sometimes causes information to be disclosed from the connecti...
CVE-2020-11650
PUBLISHED: 2020-04-08
An issue was discovered in iXsystems FreeNAS 11.2 and 11.3 before 11.3-U1. It allows a denial of service.
CVE-2020-11653
PUBLISHED: 2020-04-08
An issue was discovered in Varnish Cache before 6.0.6 LTS, 6.1.x and 6.2.x before 6.2.3, and 6.3.x before 6.3.2. It occurs when communication with a TLS termination proxy uses PROXY version 2. There can be an assertion failure and daemon restart, which causes a performance loss.