Blog

Jan
03

    Someone asked me about the Hash DoS attack recently disclosed at CCC, so I thought I would give a high level explanation of it here in case it benefits others as well. Hash tables are often used in programming languages to map data keys and values together. A comparable real world example could be a phone book which maps a person's name (the key) to their phone number (the value).

| 586 Hits
Dec
02

    On a recent engagement we gained unrestricted administrative access to a certain proprietary web application by exploiting a Session Fixation flaw. According to the WASC Threat Classification v2, Session Fixation is an attack technique that forces a user's session ID to an explicit value.

| 256 Hits
Nov
16

    Often when implementing customised ModSecurity solutions we need to extend the built-in functionality via Lua scripting. One of the disadvantages to this approach is the added latency penalty paid for not using the native rules language. When web site performance is critical for business continuity, every additional millesecond counts. The current trunk code fixes a long-standing limitation where ModSecurity needed to create a new VM for each request, which added latency every time a Lua script was executed.

| 629 Hits
Oct
15

Lets say that at some point you decided to adhere to security best practices and set a password on your iPhone backups so that they are encrypted. A year or two later you have upgraded your iPhone to a new version and you want to transfer all of your data across to the new phone. You attempt to restore from your backup and, doh, you need to remember the password you set. You try every password you could have set but none of them work.

| 1,779 Hits

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