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Date: Mon, 10 Oct 2016 23:25:55 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
cc: Sabrina Dubroca <sdubroca@...hat.com>
Subject: CVE-2016-7039 Kernel: net: unbounded recursion in the vlan GRO
 processing

    Hello,

Linux kernel built with the 802.1Q/802.1ad VLAN(CONFIG_VLAN_8021Q) OR Virtual 
eXtensible Local Area Network(CONFIG_VXLAN) with Transparent Ethernet 
Bridging(TEB) GRO support, is vulnerable to a stack overflow issue. It could 
occur while receiving large packets via GRO path; As an unlimited recursion 
could unfold in both VLAN and TEB modules, leading to a stack corruption in 
the kernel.

A remote user could use this flaw to cause kernel panic by sending malicious 
packets to a server that has GRO enabled.

Please see a proposed patch to fix this issue attached herein.

'CVE-2016-7039' has been assigned to this issue by Red Hat Inc.

Reference:
----------
   -> https://bugzilla.redhat.com/show_bug.cgi?id=1375944

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F
View attachment "upstream-0001-net-add-recursion-limit-to-GRO.patch" of type "text/plain" (8015 bytes)

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