ROOTS: On The (In-)Security Of JavaScript Object Signing and Encryption – Dennis Detering

Sanna/ November 14, 2017/ Security

JavaScript Object Notation (JSON) has evolved to the de-facto standard file format in the web used for application configuration, cross- and same-origin data exchange, as well as in Single Sign-On (SSO) protocols such as OpenID Connect. To protect integrity, authenticity and confidentiality of sensitive data, JavaScript Object Signing and Encryption (JOSE) was created to apply cryptographic mechanisms directly in JSON messages. We investigated the security of JOSE and present different applicable attacks on several popular libraries. We introduce JOSEPH (JavaScript Object Signing and Encryption Pentesting Helper) – our newly developed Burp Suite extension, which automatically performs security analysis on targeted applications. JOSEPH’s automatic vulnerability detection ranges from executing simple signature exclusion or signature faking techniques, which neglect JSON message integrity, up to highly complex cryptographic Bleichenbacher attacks breaking the confidentiality of encrypted JSON messages.

Read More

DeepSec2016 Talk: Abusing LUKS to Hack the System – Interview with Ismael Ripoll & Hector Marco

Sanna/ October 21, 2016/ Conference, Interview

Please tell us the top facts about your talk. It discloses a vulnerability that affects Linux systems encrypted with Luks, and how it can be abused to escalate privileges: CVE-2016-4484 Includes a sketch of the boot sequence with a deeper insight into the initrd Linux process A brief discussion about why complexity is the enemy of security: The whole system needs to be observed. A practical real working demo attack will be presented. How did you come up with it? Was there something like an initial spark that set your mind on creating this talk? Well, this is a difficult question. Basically, it is an attitude in front of the computer. When we start a research line, we don’t stop digging until the ultimate doubt and question is addressed. After the GRUB 28 bug, we keep reviewing the rest of

Read More

DeepSec 2014 Talk: Safer Six – IPv6 Security in a Nutshell

René Pfeiffer/ October 20, 2014/ Conference, Internet, Interview

The Internet Protocol Version 6 (IPv6) is the successor to the currently main IP Version 4 (IPv4). IPv6 was designed to address the need for more addresses and for a better routing of packets in a world filled with billions of networks and addresses alike. Once you decide to develop a new protocol, you have the chance to avoid all the mistakes of the past. You can even design security features from the start. That’s the theory. In practice IPv6 has had its fair share of security problems. There has been a lot of research, several vulnerabilities have been discussed at various security conferences. DeepSec 2014 features a presentation called Safer Six – IPv6 Security in a Nutshell held by Johanna Ullrich of SBA Research, a research centre for information security based in Vienna.

Read More