Microsoft looks back at MS08-067

The most infamous Microsoft patch of all time, in security circles at least, is MS08-067. As the name suggests, it was the 67th security update that Microsoft released in 2008. Less obviously, it fixed a huge problem in a file called netapi32.dll. Of course, 2008 was a long time ago in computing circles, but not far enough. I still hear stories about production servers that are missing MS08-067.

Last week, Microsoft took a look back at MS08-067, sharing some of its own war stories, including how they uncovered the vulnerability, developed a fix, and deployed it quickly. It’s unclear who besides Microsoft knew about the problem at the time, but one must assume others were aware of it and using it. They certainly were after the fall of 2008.

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What cross-site scripting is and how to recognize it

In many security job interviews, the interviewer will ask about cross-site scripting, also known as XSS. Most descriptions of it are overly complex, however. The best description of it that I’ve ever heard is just five words long: Code execution in the browser.

That succinctly sums up the problem: You don’t want someone to be able to inject their code into your site.

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What is Winshock?

So the other day I got blindsided with a question at work: What are we doing about Winshock. Winshock, I asked? I had to go look it up, and I found that’s what they dubbed what I’ve been calling MS14-066, the vulnerability in Schannel, which is Microsoft’s implementation of SSL/TLS for Windows.

Based on that, I’d argue it has more in common with Heartbleed than Shellshock, but I guess “Winshock” is catchier than “Winbleed.”

Then the lead of another team asked me to brief his team on Winshock. I actually managed to anticipate all but three of the questions they asked, too, which was better than I expected. Some of what I shared with them is probably worth sharing further.

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Bash is worse than heartbleed! Oh noes!

A really bad remote code execution bug surfaced yesterday, in Bash–the GNU replacement for the Unix shell. If you have a webserver running, or possibly just SSH, it can be used to execute arbitrary code. It affects anything Unixy–Linux, BSD, Mac OS X, and likely many proprietary Unix flavors, since many of them have adopted the GNU toolchain.

This could be really bad. Some people are calling it potentially worse than Heartbleed. Maybe. I’m thinking it’s more along the lines of MS08-067. But there’s an important lesson we must learn from this. Read more

More Home Depot details emerge

Late last week, Home Depot finally released a statement about its data breach. At least they had the decency to call the attack “custom” and not spin it as “advanced” or “sophisticated.” Even “custom” is really a euphemism, as the attack wasn’t all that different from what other retailers experienced earlier in the year. It may have been as simple as recompressing the BlackPOS malware using a different compression algorithm or compression ratio to evade antivirus.

The breach involves about 56 million cards, making it a bigger breach than Target.  Read more

Why you need to guard your Backup Exec servers

If you have a Windows domain, there’s a fairly good chance you have Backup Exec servers, because you probably want to take backups. Because you need them. (As a security guy, I no longer care how you get backups; just that you’re getting them somehow.) Backup Exec is a popular solution for that. But there’s a problem.

A security problem, that is. The quality of Backup Exec as a product hasn’t been my problem since 2005. The problem I have with it now is that Backup Exec stores its passwords in a database. The passwords are encrypted, but it’s possible to decrypt the backup copy, if you’re determined enough.

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Time to update Flash again. This is a big one.

There’s an exploit in Flash, on all platforms, being actively exploited in the wild. Adobe rushed out an update. See more at Ars Technica. It allows remote code execution, so this one is as bad as it gets.

Installing EMET is a potential mitigation against Flash exploits, so if you’re running Windows, protecting Flash with EMET is an extremely good idea. Uninstalling Flash is an even better idea, but I don’t think HTML5 is quite ready to replace this scourge of computing security just yet.

I noticed that Secunia PSI automatically updated Flash on all of my machines, which was nice.

See, security doesn’t have to be painful.


Upgrading a D-Link DIR-615 to DD-WRT

Last year I bought my mother in law a D-Link router, an oddball DIR-615 revision E1 that was only sold at a few stores. It was supposed to be a Fry’s exclusive, but I bought hers at Micro Center. It worked for a while, then gave her trouble, so this year I was working with it again, and when I was setting it up, I noticed it had some security vulnerabilities–remote code execution, UPnP vulnerabilities, and who knows what else.  So that got me some practice upgrading a D-Link DIR-615 to DD-WRT.

DD-WRT’s track record and attitude towards security research could be better, but I’d rather trust my mother in law to DD-WRT’s B+ security than D-Link’s F.

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Microsoft’s bug bounty is a step in the right direction

Last week, Microsoft announced it’s offering a bug bounty program. Find a working exploit in Windows 8.1/blue/whatever it’s called this week, and Microsoft will hand over $100,000. Find a mitigation for that exploit, and Microsoft will pony up for that to, up to $50,000.

I think I know what they’re up to. Read more