Ready to use IDS Sensor with Sguil
I have just released an update on my 32-bit hardened IDS sensor (version 6.4) with all the Sguil components ready to use installation CD available here. I have also released for the first time a 64-bit equivalent (version 1.0) of the same hardened sensor available here. The CD has 3 options: sensor only, database only or all components on the same system.
The install.pdf document on how to install and configure the system is in the rel_note directory and available online for the 32-bit here and 64-bit here.
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Guy Bruneau IPSS Inc. gbruneau at isc dot sans dot org
GSM Cell Phone Encryption is Cracked - Interception of Cell Calls Possible
According to the Financial Times, a "hacking" contest sponsored by Karstren Nohl, a German Encryption Expert, has resulted in the cracking of the encryption used for GSM phones world-wide. This potentially means about 3 billion cell phones are susciptible to eavesdropping. It doesn't affect data trasmissions or 3G calls, but others are affected.
The encryption method used is A5/1 which was developed over 21 years ago. Apparently the vulnerability has been known for about 15 years but this puts it into "practical" application. Practical is in quotes because the trade association of GSM manufacturers says this cracking requires equipment beyond the reach of most people. Nohl and others disagree putting the pricetag at about $1500 USD for the equipment to begin listening to calls.
In 2004, a similar vulnerability (in A5/2, a different algorithm) caused cell phone companies to replace base stations in 3 continents to remediate the problem and took over 18 months to complete. Assuming the same action is taken, a similar multi-billion dollar effort would be needed to update cell towers worldwide. Another plan could be as simple as blanketing every area with 3G which uses a different method all together (though I'm not a cellular technology expert).
The vulnerability was annouced at this years Chaos Communications Congress in Berlin. It is not likely that wide-spread exploitation is underway or will be in the near future. Time will tell how big the impact actually is.
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John Bambenek
bambenek at gmail /dot/ com
KDC DoS in cross-realm referral processing
If you are currently using MIT krb5 release krb5-1.7, a null pointer dereference has been reported where an unauthenticated remote attacker could cause the KDC to crash (DoS). This is not a vulnerability in the Kerberos protocol. A patch and a workaround has been made available here.
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Guy Bruneau IPSS Inc. gbruneau at isc dot sans dot org
Comments
Anonymous
Dec 3rd 2022
10 months ago
Anonymous
Dec 3rd 2022
10 months ago
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Anonymous
Dec 26th 2022
9 months ago
Anonymous
Dec 26th 2022
9 months ago
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Anonymous
Dec 26th 2022
9 months ago
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Anonymous
Dec 26th 2022
9 months ago
Anonymous
Dec 26th 2022
9 months ago
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Dec 26th 2022
9 months ago
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https://clickercounter.org/
https://defineprogramming.com/
Dec 26th 2022
9 months ago
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Jan 2nd 2023
9 months ago