From: "Vitaly V. Bursov" <vitalyvb@ukr.net>
To: linux-kernel@vger.kernel.org
Cc: Alan Cox <alan@redhat.com>
Subject: linux-2.6.7 Equalizer Load-balancer. eql.c. local non-privileged DoS
Date: Fri, 18 Jun 2004 11:51:53 +0300 [thread overview]
Message-ID: <20040618115153.3ad2dc32.vitalyvb@ukr.net> (raw)
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Hello,
there are multiple vulns in drivers/net/eql.c
====
static int eql_g_slave_cfg(struct net_device *dev, slave_config_t __user *scp)
{
...
if (copy_from_user(&sc, scp, sizeof (slave_config_t)))
return -EFAULT;
slave_dev = dev_get_by_name(sc.slave_name);
ret = -EINVAL;
spin_lock_bh(&eql->queue.lock);
if (eql_is_slave(slave_dev)) {
...
====
and
====
static int eql_s_slave_cfg(struct net_device *dev, slave_config_t __user *scp)
{
....
if (copy_from_user(&sc, scp, sizeof (slave_config_t)))
return -EFAULT;
eql = dev->priv;
slave_dev = dev_get_by_name(sc.slave_name);
ret = -EINVAL;
spin_lock_bh(&eql->queue.lock);
if (eql_is_slave(slave_dev)) {
====
if there is no such device, dev_get_by_name returns NULL and everything dies.
Exploiting this is trivial.
Hopefully somebody will check this file carefully and fix it.
I am not in a list.
--
Thanks,
Vitaly
GPG Key ID: F95A23B9
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next reply other threads:[~2004-06-18 9:06 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-18 8:51 Vitaly V. Bursov [this message]
2004-06-18 11:35 ` Herbert Xu
2004-06-19 21:05 ` Jeff Garzik
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