Obvious Lessons from the Skype outage
Abel Avram has posted an interesting analysis of the causes and solutions of the December 22nd Skype outage that affected millions of users.
In short the outage was caused by a bug in the undelivered message code. This bug had been fixed in a subsequent version, but 50% of Skype users were still using the buggy version. With Skype being a peer-to-peer application, and 40% of Skype clients crashing when the undelivered messages attempted delivery, it caused undo strain on the remaining Skype users' machines. These clients then left the Skype network to protect themselves; thus causing a cascading network failure.
Most interesting are the lessons, which in retrospect seem a little obvious:
- "One important lesson to be learned is this: many users do not update their software if they don’t have to...". Apparently Skype is considering a Google Chrome style invisible update.
- "Skype deciding to review their “testing processes to determine better ways of detecting and avoiding bugs which could affect the system.”"
- “will keep under constant review the capacity of our core systems that support the Skype user base, and continue to invest in both capacity and resilience of these systems.”
Patching, testing; and adequate capacity. Aren't these pretty much the cornerstones of effective IT?
-- Rick Wanner - rwanner at isc dot sans dot org - http://namedeplume.blogspot.com/ - Twitter:namedeplume (Protected)
SamuraiWTF Review over at ISSA Toolsmith
One place I try to keep up with is Russ McRee's ISSA Toolsmith reviews of security tools. The December edition of the Toolsmith contains Russ's review of SamuraiWTF. SamuraiWTF is web-application pentesting framework on a liveCD assembled by Justin Searle from InGuardians and fellow ISC Handler Kevin Johnson of Secure Ideas.
Although SamuraiWTF is really too big to review in one magazine article, Russ does hit the high points in his review and concludes that "SamuraiWTF rocks, plain and simple". It seems clear that if you spend any time doing webapp pentesting this is a tool that you should take a closer look at.
-- Rick Wanner - rwanner at isc dot sans dot org - http://namedeplume.blogspot.com/ - Twitter:namedeplume (Protected)
Comments
www
Nov 17th 2022
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EEW
Nov 17th 2022
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Nov 17th 2022
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mashood
Nov 17th 2022
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isc.sans.edu
Nov 23rd 2022
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Nov 23rd 2022
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Dec 3rd 2022
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isc.sans.edu
Dec 3rd 2022
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<a hreaf="https://technolytical.com/">the social network</a> is described as follows because they respect your privacy and keep your data secure. The social networks are not interested in collecting data about you. They don't care about what you're doing, or what you like. They don't want to know who you talk to, or where you go.
<a hreaf="https://technolytical.com/">the social network</a> is not interested in collecting data about you. They don't care about what you're doing, or what you like. They don't want to know who you talk to, or where you go. The social networks only collect the minimum amount of information required for the service that they provide. Your personal information is kept private, and is never shared with other companies without your permission
isc.sans.edu
Dec 26th 2022
5 months ago
isc.sans.edu
Dec 26th 2022
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