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Bug 871848 - (CVE-2012-4565) CVE-2012-4565 kernel: net: divide by zero in tcp algorithm illinois
CVE-2012-4565 kernel: net: divide by zero in tcp algorithm illinois
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20121031,repor...
: Security
Depends On: 866514 866518 871920 871921 871922 871923
Blocks: 871849
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Reported: 2012-10-31 10:21 EDT by Petr Matousek
Modified: 2015-02-16 10:54 EST (History)
25 users (show)

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Doc Type: Bug Fix
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Last Closed: 2013-06-05 14:58:11 EDT
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RHEL 7.3 requirements from Atomic Host:


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Description Petr Matousek 2012-10-31 10:21:36 EDT
Reading TCP stats when using TCP Illinois congestion control algorithm can cause a divide by zero kernel oops.

An unprivileged local user could use this flaw to crash the system.

Proposed upstream patch:
http://thread.gmane.org/gmane.linux.network/247871

Acknowledgements:

This issue was discovered by Rodrigo Freire of Red Hat.
Comment 3 Petr Matousek 2012-10-31 13:52:45 EDT
Created kernel tracking bugs for this issue

Affects: fedora-all [bug 871923]
Comment 4 Petr Matousek 2012-10-31 14:04:06 EDT
Statement:

This issue did not affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 5.

This issue did affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 6.

This issue did affect the version of Linux kernel as shipped with Red Hat Enterprise MRG 2.
Comment 6 errata-xmlrpc 2012-12-04 15:04:08 EST
This issue has been addressed in following products:

  MRG for RHEL-6 v.2

Via RHSA-2012:1491 https://rhn.redhat.com/errata/RHSA-2012-1491.html
Comment 7 John Kacur 2012-12-17 10:16:01 EST
I believe this is
commit dee1f973ca341c266229faa5a1a5bb268bed3531 upstream
Comment 8 errata-xmlrpc 2012-12-18 17:36:20 EST
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2012:1580 https://rhn.redhat.com/errata/RHSA-2012-1580.html

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