![]() ![]() Note that you were also just as vulnerable before the patch was released. Should you do this, your system is vulnerable should you come across one of the rogue fonts. Alternatively you can uninstall the patch.While there is no doubt such a rogue font exists, I’d never heard of one prior to this patch being released. But by leaving the patch installed, you will not be able to use OpenType fonts with PostScript outlines in the programs listed above (and maybe more). This rogue font may also be something you downloaded and installed and it would likely be a “free” font. You can leave the patch installed and it claims to protect you against having a remote code execution run on your machine if you should go to a Web site using a maliciously-designed font.So I will give you the two options you face and you can decide which is the correct path for you to take. Some of the comments on my original post thanked me for explaining how to make fonts start working again and others claimed I was giving reckless advice in telling users to uninstall this update. Microsoft is very aware of this problem and they know it affects their own software. Programmers from the various software companies have verified the problem is caused by this update and reported it to Microsoft. While this patch was designed to stop remote code execution from a rogue font, it has stopped thousands of very legitimate fonts from working. As OpenType fonts can also contain TrueType data, you may have some OpenType fonts that work and some that don’t. The problem only seems to occur with OpenType fonts containing PostScript outlines. When the KB2753842 update is installed, this function fails to return a memory size and therefore the font will not work correctly. Suffice it to say, this is an official feature of Windows that Microsoft wants developers to use for this purpose. When software needs to get the curves of a glyph (character) from a font, it uses an API (application programming interface) call in Windows called GetGlyphOutline(). Let’s go over this problem in a little more technical detail. Look at that list again as it breaks Microsoft’s own products! I fear the list will continue to grow. ![]() This problem also will strike users of Adobe Flash, Serif PagePlus, FlexiSign, Microsoft Excel and Microsoft PowerPoint. I feared other software would soon be added to that list and it has indeed happened. At that time, I only knew that users of CorelDRAW and QuarkXpress were having this issues. It was important to get this written and posted as soon as possible because I knew a large number of users of graphic software were finding that all of a sudden some of their fonts had stopped working. Yesterday, I wrote Windows Update KB2753842 Will Make Some Fonts Stop Working. ![]()
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