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.

Operations

7/16/2018
03:00 PM

10 Ways to Protect Protocols That Aren't DNS

Here's how to safeguard three other network foundation protocols so they don't become weapons or critical vulnerabilities.
3 of 11

BGP: Security From TTL
ACLs are the first, and most important, method for protecting BGP. In the next tier of protections is one that takes advantage of a broader mechanism of network protection: time to live (TTL).
TTL security is described in the Generalized TTL Security Mechanism (GTSM) found in IETF RFC 5082. Essentially, this says that a packet taking too long to reach you can't come from a neighbor - and if it's not from a neighbor, it can be discarded.
The basic method is to set the TTL to 255 (the maximum value), which requires that packets arrive from a direct connection. Since each layer 3 device that touches a packet decrements the TTL, no packet that has been bounced around can meet the requirement.
(Image: Min C. Chiu VIA SHUTTERSTOCK)

BGP: Security From TTL

ACLs are the first, and most important, method for protecting BGP. In the next tier of protections is one that takes advantage of a broader mechanism of network protection: time to live (TTL).

TTL security is described in the Generalized TTL Security Mechanism (GTSM) found in IETF RFC 5082. Essentially, this says that a packet taking too long to reach you can't come from a neighbor and if it's not from a neighbor, it can be discarded.

The basic method is to set the TTL to 255 (the maximum value), which requires that packets arrive from a direct connection. Since each layer 3 device that touches a packet decrements the TTL, no packet that has been bounced around can meet the requirement.

(Image: Min C. Chiu VIA SHUTTERSTOCK)

3 of 11
Comment  | 
Print  | 
Comments
Newest First  |  Oldest First  |  Threaded View
Jon M. Kelley
100%
0%
Jon M. Kelley,
User Rank: Moderator
7/19/2018 | 12:01:23 PM
Too many tabs, too little info
THis is the first time this year that I've gone through one of DRs multitab "specials".  To be honest this post subject still explains why I skip them:  too many slow loading tabs, with almost no relevant text per tab. Tabs with less than 100 words - get real.  Maybe I'll try again near Christmas.
Data Leak Week: Billions of Sensitive Files Exposed Online
Kelly Jackson Higgins, Executive Editor at Dark Reading,  12/10/2019
Lessons from the NSA: Know Your Assets
Robert Lemos, Contributing Writer,  12/12/2019
4 Tips to Run Fast in the Face of Digital Transformation
Shane Buckley, President & Chief Operating Officer, Gigamon,  12/9/2019
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
The Year in Security: 2019
This Tech Digest provides a wrap up and overview of the year's top cybersecurity news stories. It was a year of new twists on old threats, with fears of another WannaCry-type worm and of a possible botnet army of Wi-Fi routers. But 2019 also underscored the risk of firmware and trusted security tools harboring dangerous holes that cybercriminals and nation-state hackers could readily abuse. Read more.
Flash Poll
Rethinking Enterprise Data Defense
Rethinking Enterprise Data Defense
Frustrated with recurring intrusions and breaches, cybersecurity professionals are questioning some of the industrys conventional wisdom. Heres a look at what theyre thinking about.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2019-19807
PUBLISHED: 2019-12-15
In the Linux kernel before 5.3.11, sound/core/timer.c has a use-after-free caused by erroneous code refactoring, aka CID-e7af6307a8a5. This is related to snd_timer_open and snd_timer_close_locked. The timeri variable was originally intended to be for a newly created timer instance, but was used for ...
CVE-2014-8650
PUBLISHED: 2019-12-15
python-requests-Kerberos through 0.5 does not handle mutual authentication
CVE-2014-3536
PUBLISHED: 2019-12-15
CFME (CloudForms Management Engine) 5: RHN account information is logged to top_output.log during registration
CVE-2014-3643
PUBLISHED: 2019-12-15
jersey: XXE via parameter entities not disabled by the jersey SAX parser
CVE-2014-3652
PUBLISHED: 2019-12-15
JBoss KeyCloak: Open redirect vulnerability via failure to validate the redirect URL.