TLS
Open ports in the Time of Corona
· β˜• 3 min read
One of the side effects of social distancing and self-quarantining due to COVID-19 was a large increase in the use of VPNs (and, in some cases, different remote access protocols, such as RDP or SSH) by companies around the world, so that their employees might work from home. I was wondering how large this increase would be when compared to the usual state of affairs. To determine this, I took a look at data I gathered from Shodan over the course of March and made couple of - hopefully interesting - charts.

Most visited adult sites actually beat some e-banking portals when it comes to encryption
· β˜• 5 min read
After I finished the analysis of SSL/TLS configuration of almost 1400 internet banking portals (see the relevant ISC Diary, a question came to me. Internet banking portals should be among the best secured systems put online, yet not all of them made the mark when it came to encryption used to secure HTTP traffic. Would the situation be even worse for sites which are commonly assumed to lack proper security measures?

Looking back at July 2015
· β˜• 2 min read
The most important IT security-related news in July has definitely been the affair surrounding a theft of data from the Hacking Team – company, which develops commercial spyware intended for use by police departments and other security agencies. More than 400 GB of stolen data were made public and afterwards analyzed by IT security specialists, leading to discovery of a large number (still growing) of zero-day vulnerabilities which were used in Hacking Team’s products.

Looking back at May 2015
· β˜• 1 min read
May has been at least as rich on cybersecurity incidents and events as any of the previous months of the year. Some of the more important are described in the following text. The VENOM (Virtual Environment Neglected Operations Manipulation) vulnerability may be considered to be a very significant one. VENOM is a vulnerability in the code of a virtual floppy drive which is used by some of the virtualization platforms (QEMU, KVM, Xen).

FREAK - a high impact vulnerability in TLS/SSL
· β˜• 1 min read
An international research team has devised attack called FREAK (Factoring attack on RSA Export Keys) with which it is possible to lower the level of encryption used in SSL connections. Attack is based on forcing server and client to use legacy (the vulnerability has been present for a long time) weak cryptographic suites which are still supported by some of the mainstream browsers (Safari and OpenSSL-based Android browser among others) and servers.