From 0b8a0a777d2d114f84716117ffb36a3d3644b7fe Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Mon, 21 Jan 2008 02:20:19 +0200 Subject: [PATCH] vfs: coredumping fix (CVE-2007-6206) fix: http://bugzilla.kernel.org/show_bug.cgi?id=3043 only allow coredumping to the same uid that the coredumping task runs under. Signed-off-by: Ingo Molnar Signed-off-by: Adrian Bunk --- fs/exec.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/exec.c b/fs/exec.c index 91a36b27ec91..f28672f6a172 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -1512,6 +1512,12 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs) if (!S_ISREG(inode->i_mode)) goto close_fail; + /* + * Dont allow local users get cute and trick others to coredump + * into their pre-created files: + */ + if (inode->i_uid != current->fsuid) + goto close_fail; if (!file->f_op) goto close_fail; if (!file->f_op->write) -- 2.39.5