PLUG February HackFest

Various important security daemon patches have only recently been released including Bind9, OpenSSL, cups & NTP for Ubuntu; Redhat5 Avahi (FC 10) and SquirrelMail. So we will demonstrate exploits available for these issues:

1) OpenSSL: (Using Debian) http://www.metasploit.com/users/hdm/tools/debian-openssl/
Brute Forcing Tools Include: http://www.milw0rm.com/exploits/5622 http://metasploit.com/users/hdm/tools/debian-openssl/debian_openssh_key_...

OpenSSL: Examples will also apply to the recent issues with OpenSSL: Several functions inside OpenSSL incorrectly checked the result after calling the EVP_VerifyFinal function, allowing a malformed signature to be treated as a good signature rather than as an error. The issue affected the signature checks on DSA and ECDSA keys used with SSL/TLS for various mail systems and DNS systems built upon OpenSSL also. We will show an easy 'man in the middle' attack to present a malformed SSL/TLS signature from a certificate chain to a vulnerable client, bypassing validation and segway into a discussion of the MD5 Verisign cert issues.

2) NTP Spoofing: (Using Debian) NTP Spoofing has been a staple of DoS and remote root exploits since the 1990's. Usually NTP is selectively allowed to egress DMZ via stateful packet inspection (that will catch spoofed packets) via source and destination (or served via internal NTP daemons). It's common to spoof the NTP servers while sending exploitive packets. A new issue has been identified: http://www.debian.org/security/2009/dsa-1702

A simple exploit using netcat will be demonstrated: http://cybexin.blogspot.com/2009/01/introduction-to-netcat.html

3) Overview of BEef: http://www.bindshell.net/tools/beef

We will also look at forensic image from the November Hackfest and discuss ways to protect (arp, VPN/VLAN, Switches, SELINUX) from the inevitable pwnership in a production or users desktop system.

We will not dissect squirrelmail, since it's only a XSS issue (similar to 9 out of 10 running versions of Apache httpd in consumerland). We will not dissect Bind9 because it also relates to the OpenSSL malformed signature. Other PRNG type entropy issues with SSL exist, just waiting to be popularlized, so we will wait for the industry to continue to ignore this and other issues inherent in various protocols.