On 2007-Jan-18 22:21:52 +0800, XFOCUS Security Team <[EMAIL PROTECTED]> wrote: >The affected OSes allows local users to write to or read from restricted >files by closing the file descriptors 0 (standard input), 1 (standard >output), or 2 (standard error), which may then be reused by a called >setuid process that intended to perform I/O on normal files. the attack >which exploit this vulnerability possibly get root right.
This vulnerability has been known for years. OpenBSD implemented a kernel check to block this attack in 1998. FreeBSD and NetBSD have similar kernel checks and I believe glibc also has checks to block this. It is disturbing that none of the commercial OS vendors appear to have bothered to protect against this. -- Peter Jeremy
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