The i386_set_ldt system call in NetBSD 1.5 and previous versions, and OpenBSD 2.8 and previous versions, when the USER_LDT kernel option is enabled, does not validate a call gate target, which allows local users to gain root privileges by creating a segment call gate in the Local Descriptor Table (LDT) with a target that specifies an arbitrary kernel address.
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netbsd netbsd |
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openbsd openbsd |
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