Hash collisions vulnerability in web servers
A new vulnerability advisory by security firm n-runs [1] describes how hash tables in PHP5,Java,ASP.NET and others can be attacked with deliberate collisions in the hash function, leading to a denial of service (DoS) on the web server in question. Microsoft have already responded with an advisory [2] of their own, other vendors are likely to follow.
Updated 2300UTC: MSFT published additional information [3] on how to detect and mitigate an attack.
[1] http://www.nruns.com/_downloads/advisory28122011.pdf
[2] http://technet.microsoft.com/en-us/security/advisory/2659883
[3] http://blogs.technet.com/b/srd/archive/2011/12/27/more-information-about-the-december-2011-asp-net-vulnerability.aspx
.nl.ai ?
Now .. where is nl.ai ?? Dot-ai is Anguilla, a speck of land in the Caribbean, to the east of Puerto Rico. And probably has nothing at all to do with what follows. Dot-nl-dot-ai, on the other hand, appears to be a free domain name registrar.
If you're into malware analysis, you've probably seen your fair share of .nl.ai domains recently. And not just these. Feeding "nl.ai" into RUS-CERTs Passive DNS collector http://www.bfk.de/bfk_dnslogger.html?query=ns1.cd.am#result gives us the name server for .nl.ai (one ns1.cd.am), which in turn shows a couple of other domains that are currently very familiar to the malware analyst. Like .c0m.li, and .cc.ai.
If you are blocking domains on your gateway or DNS server, blackholing these few
.cc.ai
.nl.ai
.c0m.li
.cd.am
.coom.in
might be a reasonable move, at least until someone in your business can show that they have a legitimate need to access one of the sub domains of these pseudo top level domains. Mind you, chances are that not all domains hosted there in fact are bad. But all the ones that I've seen in my logs so far: were.
Comments
Anonymous
Dec 3rd 2022
9 months ago
Anonymous
Dec 3rd 2022
9 months ago
<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
Anonymous
Dec 26th 2022
9 months ago
Anonymous
Dec 26th 2022
9 months ago
<a hreaf="https://defineprogramming.com/the-public-bathroom-near-me-find-nearest-public-toilet/"> nearest public toilet to me</a>
<a hreaf="https://defineprogramming.com/the-public-bathroom-near-me-find-nearest-public-toilet/"> public bathroom near me</a>
Anonymous
Dec 26th 2022
9 months ago
<a hreaf="https://defineprogramming.com/the-public-bathroom-near-me-find-nearest-public-toilet/"> nearest public toilet to me</a>
<a hreaf="https://defineprogramming.com/the-public-bathroom-near-me-find-nearest-public-toilet/"> public bathroom near me</a>
Anonymous
Dec 26th 2022
9 months ago
Anonymous
Dec 26th 2022
9 months ago
https://defineprogramming.com/
Dec 26th 2022
9 months ago
distribute malware. Even if the URL listed on the ad shows a legitimate website, subsequent ad traffic can easily lead to a fake page. Different types of malware are distributed in this manner. I've seen IcedID (Bokbot), Gozi/ISFB, and various information stealers distributed through fake software websites that were provided through Google ad traffic. I submitted malicious files from this example to VirusTotal and found a low rate of detection, with some files not showing as malware at all. Additionally, domains associated with this infection frequently change. That might make it hard to detect.
https://clickercounter.org/
https://defineprogramming.com/
Dec 26th 2022
9 months ago
rthrth
Jan 2nd 2023
8 months ago