From d8a2707576c2d12dd79d797a9bff3b10b3d182f7 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Fri, 14 Jul 2006 23:59:02 +0000 Subject: [PATCH] Fix nasty /proc vulnerability (CVE-2006-3626) Fix nasty /proc vulnerability We have a bad interaction with both the kernel and user space being able to change some of the /proc file status. This fixes the most obvious part of it, but I expect we'll also make it harder for users to modify even their "own" files in /proc. Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- fs/proc/base.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/proc/base.c b/fs/proc/base.c index c192cb2af2c8..9d996746a1a6 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -1366,6 +1366,7 @@ static int pid_revalidate(struct dentry *dentry, struct nameidata *nd) } else { inode->i_uid = 0; inode->i_gid = 0; + inode->i_mode = 0; } security_task_to_inode(task, inode); return 1; -- cgit v1.2.3