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MS06-049 Causing Silent Data Corruption

Posted by ryuzaki0 on from the oh-who-wants-encryption-anyway dept.

Uncle Mike writes "It looks like there is a problem with the recently released MS06-049 / KB920958 patch. If you have compression activated on any folder, then the compressed data is at risk from corruption. New files that are close to a multiple of 4K in size will have their last 4,000 bytes or so overwritten with 0xDF. Although this problem has been reported to Microsoft, as yet there appears to have been no official announcement. "

2 of 205 comments (clear)

  1. Re:How does something like this happen? by 140Mandak262Jamuna · · Score: 2, Interesting

    My pure guess based on /. comments: How can this happen? Loop counting error. Probably from integer division of the file size/ 4K chunks. Allocator did it right, loop missed the last chunk. Very common. Typically a novice error. But can blindside even experienced ones. QA should have nailed it.

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    sed -e 's/Chuck Norris/Rajnikant/g' joke > fact
  2. Re:How does something like this happen by edmudama · · Score: 2, Interesting

    Baloney. Don't blame the testers if they can't find all the bugs written by a poor programmer. It's the [good] programmer's job to test their own code first, as they have the most intimate knowledge of all the ways it could fail.

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    More data, damnit!