![]() Launched in November 2004, the free and open-source browser had lots of new features and fewer security issues compared to IE6, and it quickly became a popular alternative.Īs a result, Microsoft never dominated the web browser market share again as it did at the peak of IE6 in 2004. That piece of advice led to the third development, which was the release of Mozilla's Firefox browser. Microsoft did issue patches to try to correct these issues, but US-CERT also advised IE6 users to disable Active scripting and ActiveX controls in the browser or just use another browser completely. By causing script to be evaluated in the Local Machine Zone, the attacker could execute arbitrary code with the privileges of the user running IE. An attacker could exploit this vulnerability to evaluate script in different security domains. Microsoft Internet Explorer (IE) does not adequately validate the security context of a frame that has been redirected by a web server. An archived post from the US Computer Emergency Readiness Team (US-CERT) at Carnegie Mellon University describes the issue: Those flaws in Microsoft's web browser got so bad that, in June 2004, the US government had to issue an advisory asking PC owners not to use IE6 without certain precautions. The security issues let IE6 to download malware directly to PCs via those sites. These flaws were being used by hackers to infect the PCs of IE6 users by them just visiting infected websites. As reported by ZDNet at the time, in 2004 security researchers found lots of issues in the browser. That lack of active development led to the discovery of a number of serious security flaws in IE6. The first was that Microsoft basically decided, after six major releases of IE, to take a step back and not try to develop and release a major feature update to IE6 as quickly as previous IE versions has been updated in the past. That's because of three developments, all of which led into each other. However, the release of IE6 might have been the start of a major turning point in Microsoft's command of the browser market. The browser, which we will refer to as IE6 from now on, quickly dominated the market with a share as high as 90 percent at one point in 2004. ![]() On August 24, 2001, 22 years ago this week, Microsoft Internet Explorer 6.0 was released, a couple of months before the company's next consumer OS, Windows XP, was launched. It was a pretty bare-bones browser, but Microsoft quickly updated it with a 2.0 version later that year, followed by 3.0 in 1996, 4.0 in 1997, and 5.0 in 1999. Earlier this month, we talked about the launch of Microsoft's first web browser, I nternet Explorer 1.0, back in 1995.
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