Privilege Escalation via Unvalidated Call Gate Target in i386_set_ldt System Call

CVE-2001-0268 · HIGH Severity

AV:L/AC:L/AU:N/C:C/I:C/A:C

The i386_set_ldt system call in NetBSD 1.5 and earlier, and OpenBSD 2.8 and earlier, 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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