Debian OpenSSL

This is a compilation of my notes on this matter

Links

• http://www.debian.org/security/2008/dsa-1576
• http://metasploit.com/users/hdm/tools/debian-openssl/
• http://www.milw0rm.com/exploits/5622
• http://www.yobi.be/files/blacklist.RSA-1024 32-bit Intel platform

misc

• http://www.nabble.com/blacklist.RSA-1024-missing--td17258799.html

OpenSSH

Etch version gives you openssh-blacklist package and ssh-vulnkey in openssh-client
This Etch version has a sshd which checks all client connections against the blacklist so even if the keys are still in authorized_keys you should be safe

OpenSSL

wget https://launchpad.net/ubuntu/hardy/+source/openssl-blacklist/0.1-0ubuntu0.8.04.2/+files/openssl-blacklist_0.1-0ubuntu0.8.04.2.tar.gz
tar xzf openssl-blacklist_0.1-0ubuntu0.8.04.2.tar.gz
cd openssl-blacklist-0.1
Edit debian/control and cleans the dependence on openssl for Ubuntu
fakeroot debian/rules binary
cd ..
sudo dpkg -i openssl-blacklist_0.1-0ubuntu0.8.04.2_all.deb

Now you have openssl-vulnkey tool

OpenVPN

It's not about the SSL keys, those can be checked with openssl-vulnkey.
It's about the shared static keys (openvpn -genkey)

wget https://launchpad.net/ubuntu/hardy/+source/openvpn-blacklist/0.1-0ubuntu0.8.04.1/+files/openvpn-blacklist_0.1-0ubuntu0.8.04.1.tar.gz
tar xzf openvpn-blacklist_0.1-0ubuntu0.8.04.1.tar.gz
cd openvpn-blacklist-0.1
fakeroot debian/rules binary
cd ..
sudo dpkg -i openvpn-blacklist_0.1-0ubuntu0.8.04.1_all.deb

Now you have openvpn-vulnkey tool

Others

• encfs
  • My key is older, ouf!