Date: Tue, 24 Feb 2009 10:34:52 +0800 From: Eugene Teo <eugene@...hat.com> To: oss-security@...ts.openwall.com CC: "Steven M. Christey" <coley@...us.mitre.org> Subject: Re: CVE request: kernel: memory disclosure in SO_BSDCOMPAT gsopt Steven M. Christey wrote: > ====================================================== > Name: CVE-2009-0676 [...] > The sock_getsockopt function in net/core/sock.c in the Linux kernel > before 188.8.131.52 does not initialize a certain structure member, which > allows local users to obtain potentially sensitive information from > kernel memory via an SO_BSDCOMPAT getsockopt request. The fix for CVE-2009-0676 (upstream commit df0bca04) is incomplete. Note that the same problem of leaking kernel memory will reappear if someone on some architecture uses struct timeval with some internal padding (for example tv_sec 64-bit and tv_usec 32-bit) --- then, you are going to leak the padded bytes to userspace. net: amend the fix for SO_BSDCOMPAT gsopt infoleak http://marc.info/?l=linux-kernel&m=123540732700371&w=2 http://marc.info/?l=linux-netdev&m=123543237010175&w=2 Thanks, Eugene -- Eugene Teo / Red Hat Security Response Team
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