AsTonySh

今天 一大早就收到了DreamHost Security Team来信（看到Security Team两字就感到出事了）

Hello -
This email is regarding a potential security concern related to your
‘astonysh_com’ FTP account.
We have detected what appears to be the exploit of a number of
accounts belonging to DreamHost customers, and it appears that your
account was one of those affected.
We’re still working to determine how this occurred, but it appears
that a 3rd party found a way to obtain the password information
associated with approximately 3,500 separate FTP accounts and has
used that information to append data to the index files of customer
sites using automated scripts (primarily for search engine
optimization purposes).
Our records indicate that only roughly 20% of the accounts accessed -
less than 0.15% of the total accounts that we host - actually had
any changes made to them. Most accounts were untouched.
We ask that you do the following as soon as possible:
1. Immediately change your FTP password, as well as that of any other
accounts that may share the same password. We recommend the use of
passwords containing 8 or more random letters and numbers. You may
change your FTP password from the web panel (”Users” section, “Manage
Users” sub-section).
2. Review your hosted accounts/sites and ensure that nothing has been
uploaded or changed that you did not do yourself. Many of the
unauthorized logins did not result in changes at all (the intruder
logged in, obtained a directory listing and quickly logged back out)
but to be sure you should carefully review the full contents of your
account.
Again, only about 20% of the exploited accounts showed any
modifications, and of those the only known changes have been to site
index documents (ie. ‘index.php’, ‘index.html’, etc - though we
recommend looking for other changes as well).
It appears that the same intruder also attempted to gain direct
access to our internal customer information database, but this was
thwarted by protections we have in place to prevent such access.
Similarly, we have seen no indication that the intruder accessed
other customer account services such as email or MySQL databases.
In the last 24 hours we have made numerous significant behind-the-
scenes changes to improve internal security, including the discovery
and patching to prevent a handful of possible exploits.
We will, of course, continue to investigate the source of this
particular security breach and keep customers apprised of what we
find. Once we learn more, we will be sure to post updates as they
become available to our status weblog:
http://www.dreamhoststatus.com/
Thank you for your patience. If you have any questions or concerns,
please let us know.
- DreamHost Security Team

再看看我astonysh_com帐号下的主站还有blog的index.php还有index.html都被人改了代码！好恐怖啊。DH的信中说一共有3500个与我类似的FTP的密码被盗，幸好hacker们还比较人道，没有做什么太离谱的事儿，只是加了一些链接的代码利于他们的SEO而已，但这件事也对DH的安全措施开始怀疑，hacker们到底是怎么进入FTP的？好在我FTP下被该页面现在已经完全恢复。DH真是让我欢喜让我愁啊。

This entry was posted on Wednesday, June 6th, 2007 at 7:22 pm and is filed under Insights, Net Working. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.