Ramblings & ephemera

Rainbow Tables crack passwords

From Chapter 2: Botnets Overview of Craig A. Schiller’s Botnets: The Killer Web App (Syngress: 2007):

According to the Rainbowtables.net Web site, using their tables and others on the Internet “it is possible to crack almost any password under 15 characters using a mixed alphanumeric combination with symbols for LM, NTLM, PIX Firewall, MD4, and MD5.” [...]

Why you should run Windows as Admin

From Aaron Margosis’ “Why you shouldn’t run as admin…” (17 June 2004):

But if you’re running as admin [on Windows], an exploit can:

install kernel-mode rootkits and/or keyloggers (which can be close to impossible to detect)
install and start services
install ActiveX controls, including IE and shell add-ins (common with spyware and adware)
access data belonging to other users
cause code [...]

Bad passwords for SSH

From Christian Seifert’s “Analyzing malicious SSH login attempts” (SecurityFocus: 11 September 2006):
First, we analyzed the login names that were used on the login attempts. During the sample period, there were 2741 unique account names ranging from common first names, system account names, and common accounts to short alphabetical strings captured by the system logger. Of [...]

Two-factor authentication: the good & the bad

From Bruce Schneier’s “More on Two-Factor Authentication” (Crypto-Gram: 15 April 2005):
Passwords just don’t work anymore. As computers have gotten faster, password guessing has gotten easier. Ever-more-complicated passwords are required to evade password-guessing software. At the same time, there’s an upper limit to how complex a password users can be expected to remember. About five years [...]

California’s wide-open educational software reveals personal info

From Nanette Asimov’s “Software glitch reveals private data for thousands of state’s students” (San Francisco Chronicle: 21 October 2005):
The personal information of tens of thousands of California children — including their names, state achievement test scores, identification numbers and status in gifted or special-needs programs — is open to public view through a security loophole [...]

Rainbow cracking is now a public service

From Robert Lemos’s Rainbow warriors crack password hashes (The Register: 10 November 2005):
Over the past two years, three security enthusiasts from the United States and Europe set a host of computers to the task of creating eleven enormous tables of data that can be used to look up common passwords. The tables - totaling 500GB [...]

Users know how to create good passwords, but they don’t

From Usability News’ “Password Security: What Users Know and What They Actually Do“:
A total of 328 undergraduate and graduate level college students from Wichita State University volunteered to participate in the survey, and were regular users of the Internet with one or more password protected accounts. Ages of the participants ranged from 18 to 58 [...]

John the Ripper makes password cracking easy

From Federico Biancuzzi’s “John the Ripper 1.7, by Solar Designer“:
John the Ripper 1.7 also improves on the use of MMX on x86 and starts to use AltiVec on PowerPC processors when cracking DES-based hashes (that is, both Unix crypt(3) and Windows LM hashes). To my knowledge, John 1.7 (or rather, one of the development snapshots [...]

A brief history of backdoors

From Network Magazine:
Ken Thompson, a designer of the Unix OS, explained his magic password, a password that once allowed him to log in as any user on any Unix system, during his award acceptance speech at the Association for Computing Machinery (ACM) meeting in 1984. Thompson had included a backdoor in the password checking function [...]