patch for exec+ptrace security hole available (fwd)

[Vagner Sacramento <vagner () natalnet br>]

---------- Forwarded message ----------
Date: Sat, 16 Jun 2001 11:08:53 -0400 (EDT)
From: Aaron Campbell <aaron () monkey org>
To: security-announce () openbsd org
Subject: patch for exec+ptrace security hole available

A race condition exists in the kernel execve(2) implementation that opens
a small window of vulnerability for a non-privileged user to
ptrace(2) attach to a suid/sgid process.

2.8 patch:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/2.8/common/030_kernexec.patch

2.9 patch:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/2.9/common/007_kernexec.patch

The fix has also been committed to the 2.8 and 2.9 stable branches.

The bug was found by Georgi Guninski; Art Grabowski came up with a fix.



Vagner sacramento