Bug 1375944 (CVE-2016-7039) - CVE-2016-7039 kernel: remotely triggerable unbounded recursion in the vlan gro code leading to a kernel crash
Summary: CVE-2016-7039 kernel: remotely triggerable unbounded recursion in the vlan gr...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2016-7039
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1374191 1378405 1379913 1379914 1379920 1383476 1387549 1422645
Blocks: 1375945
TreeView+ depends on / blocked
 
Reported: 2016-09-14 09:58 UTC by Adam Mariš
Modified: 2019-12-16 06:45 UTC (History)
36 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
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.
Clone Of:
Environment:
Last Closed: 2017-09-05 05:04:24 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:2047 0 normal SHIPPED_LIVE Important: kernel security update 2016-10-11 03:07:15 UTC
Red Hat Product Errata RHSA-2016:2107 0 normal SHIPPED_LIVE Important: kernel-rt security update 2016-10-26 14:47:33 UTC
Red Hat Product Errata RHSA-2016:2110 0 normal SHIPPED_LIVE Important: kernel-rt security update 2016-10-26 16:21:02 UTC
Red Hat Product Errata RHSA-2017:0372 0 normal SHIPPED_LIVE Important: kernel-aarch64 security and bug fix update 2017-03-02 22:04:41 UTC

Description Adam Mariš 2016-09-14 09:58:40 UTC 
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 falw to cause kernel panic by sending maliciously crafted packets to a server that has GRO enabled.

Additional requirement for attacking VLAN is to have 8021q module loaded.
Additional requirement for attacking TEB is to have increased MTU.

Upstream patch
---------------
  -> https://patchwork.ozlabs.org/patch/680412/
Comment 9 Prasad Pandit 2016-10-10 18:08:46 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1383476]
Comment 10 errata-xmlrpc 2016-10-10 23:07:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2047 https://rhn.redhat.com/errata/RHSA-2016-2047.html
Comment 12 errata-xmlrpc 2016-10-26 10:47:46 UTC 
This issue has been addressed in the following products:

  MRG for RHEL-6 v.2

Via RHSA-2016:2107 https://rhn.redhat.com/errata/RHSA-2016-2107.html
Comment 13 errata-xmlrpc 2016-10-26 12:22:59 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2110 https://rhn.redhat.com/errata/RHSA-2016-2110.html
Comment 19 errata-xmlrpc 2017-03-02 17:08:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:0372 https://rhn.redhat.com/errata/RHSA-2017-0372.html
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