Issue The URL in the address bar can be spoofed when a new window or tab is opened by a malicious web page. Impact to users If a user visits … Read more
Computers are increasingly mobile and, to serve them, more and more public spaces (cafes, airports, libraries, etc.) offer their customers WiFi access. When a web browser on such a network … Read more
This Tuesday (2009-07-21), I’m organizing a crash bug triage day where anyone interested can help us classify the swamp of open crash bugs. Join us in #bugday on irc.mozilla.org if … Read more
In the last few days, there have been several reports (including one via SANS) of a bug in Firefox related to handling of certain very long Unicode strings. While these … Read more
Issue A bug discovered last week in Firefox 3.5’s Just-in-time (JIT) JavaScript compiler was disclosed publicly yesterday. It is a critical vulnerability that can be used to execute malicious code. … Read more
For several years, Cross-Site Scripting (XSS) attacks have plagued many of the web’s most popular sites and victimized their users. At Mozilla, we’ve been working for the last year on … Read more
People want to know that they are safe when they browse the web. There are important differences between browsers when it comes to security, and so it’s no surprise to … Read more
Issue The pwn2own bug that Nils discovered at CanSecWest 2009 and the XSLT vulnerability recently made public by Guido Landi (http://www.securityfocus.com/bid/34235) are both critical issues that can result in malicious … Read more
Mozilla’s Jesse Ruderman just blogged about a new CSS grammar fuzzer of his, to go along with the JS fuzzer we announced a while ago. Fuzzers are a tool that … Read more
Security metrics are very difficult to do well, and easy to do poorly. For example, take a look at the recent Secunia “2008 Report” (http://secunia.com/gfx/Secunia2008Report.pdf). It tries to break down … Read more
Issue Researchers have recently found weaknesses in the MD5 hash algorithm, relied on by some SSL certificates. Using these weaknesses, an attacker could obtain fraudulent SSL certificates for websites they … Read more
There has been some interest in the last few days about a recent report from a company called Bit9 about application vulnerabilities. While we’re always happy to see stories that … Read more