Bug 108574 - CAN-2003-0857 Netlink local DoS: iptables
CAN-2003-0857 Netlink local DoS: iptables
Status: CLOSED NOTABUG
Product: Red Hat Enterprise Linux 2.1
Classification: Red Hat
Component: iptables (Show other bugs)
2.1
All Linux
medium Severity medium
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Assigned To: Thomas Woerner
Ben Levenson
: Security
Depends On:
Blocks:
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Reported: 2003-10-30 05:26 EST by Mark J. Cox (Product Security)
Modified: 2007-11-30 17:06 EST (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2003-11-24 11:32:53 EST
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Description Mark J. Cox (Product Security) 2003-10-30 05:26:47 EST
Herbert Xu discovered that a number of netlink applications do not
check the source address of incoming packets, assuming they are coming
from the kernel.  As any local user can send unicast netlink messages
to any process on the system, this can lead to a local denial of
service attack, or other local attacks.

iptables in RHEL3 and RHEL2.1 is affected 

                ipq_read - used for userspace to deal with packets from netfilter
                ipulog_read - used for userspace logging of packets

Currently embargoed.
Comment 1 Mark J. Cox (Product Security) 2003-11-24 11:32:53 EST
We don't ship iptables-devel and nothing shipped with iptables uses
the vulnerable routines.  Therefore no errata required.

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