Worth Reading: Expert Versus Nonexpert
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The post Worth Reading: Expert Versus Nonexpert appeared first on 'net work.
BIG-IP gets a DevOps twist.
Last week ISC published a patch for a critical remotely exploitable vulnerability in the BIND9 DNS server capable of causing a crash with a single packet.
CC BY 2.0 image by Ralph Aversen
The public summary tells us that a mistake in handling of queries for the TKEY type causes an assertion to fail, which in turn crashes the server. Since the assertion happens during the query parsing, there is no way to avoid it: it's the first thing that happens on receiving a packet, before any decision is made about what to do with it.
TKEY queries are used in the context of TSIG, a protocol DNS servers can use to authenticate to each other. They are special in that unlike normal DNS queries they include a “meta” record (of type TKEY) in the EXTRA/ADDITIONAL section of the message.
CC BY 2.0 image by Ralph Aversen
Since the exploit packet is now public, I thought we might take a dive and look at the vulnerable code. Let's start by taking a look at the output of a crashing instance:
03-Aug-2015 16:38:55.509 message.c:2352: REQUIRE(*name == ((void*)0)) failed, back trace
03-Aug-2015 16:38:55.510 #0 0x10001510d in Continue reading
One of the participants of the Carrier Ethernet LinkedIn group asked a great question:
When we install a virtual-router of any vendor over an ordinary sever (having general-purpose microprocessor), can it really compete with a physical-router having ASICs, Network Processors…?
Short answer: No … and here’s my longer answer (cross-posted to my blog because not all of my readers participate in that group).
Read more ...IPv6 is inevitable, but what's the real rate of adoption in North America? Join Ethan Banks and Alain Fiocco as they discuss the state of the protocol, share educational opportunities, and offer tips to get your vendors to fully embrace IPv6.
The post PQ Show 54 – IPv6 Adoption Trends With Alain Fiocco appeared first on Packet Pushers.
Another big round for a security startup.