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Bug 1181054 - (CVE-2014-9585) CVE-2014-9585 kernel: ASLR bruteforce possible for vdso library
CVE-2014-9585 kernel: ASLR bruteforce possible for vdso library
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20141211,reported=2...
: Security
Depends On: 1181056 1184896 1184897 1184898 1184899 1184901 1252883 1252884 1423407
Blocks: 1177829
  Show dependency tree / graph
 
Reported: 2015-01-12 04:56 EST by Vasyl Kaigorodov
Modified: 2018-08-28 17:56 EDT (History)
37 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
An information leak flaw was found in the way the Linux kernel's Virtual Dynamic Shared Object (vDSO) implementation performed address randomization. A local, unprivileged user could use this flaw to leak kernel memory addresses to user-space.
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2015:1081 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2015-06-09 16:35:00 EDT
Red Hat Product Errata RHSA-2015:1778 normal SHIPPED_LIVE Important: kernel security and bug fix update 2015-09-15 12:03:32 EDT
Red Hat Product Errata RHSA-2015:1787 normal SHIPPED_LIVE Important: kernel-rt security, bug fix, and enhancement update 2015-09-15 09:22:07 EDT
Red Hat Product Errata RHSA-2015:1788 normal SHIPPED_LIVE Important: kernel-rt security, bug fix, and enhancement update 2015-09-15 09:38:06 EDT

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Description Vasyl Kaigorodov 2015-01-12 04:56:59 EST 
Linux kernel built with the Virtual Dynamic Shared Object(vDSO) support is
vulnerable to an information leakage flaw. It occurs due to less than perfect
address randomisation, which leads to leakage of vDSO library base address.

An unprivileged user could use this flaw to leak kernel memory addresses.

Upstream fix:
-------------
  -> https://git.kernel.org/linus/394f56fe480140877304d342dec46d50dc823d46

Reference:
----------
  -> http://seclists.org/oss-sec/2015/q1/103
  -> https://bugzilla.kernel.org/show_bug.cgi?id=89591
  -> http://marc.info/?l=linux-kernel&m=141909723019695&w=2
Comment 2 Vasyl Kaigorodov 2015-01-12 05:00:19 EST 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1181056]
Comment 4 Prasad J Pandit 2015-01-22 07:24:03 EST 
Statement:

This issue affects the versions of the Linux kernel as shipped with
Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2. Future kernel
updates for Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2 may
address this issue.


Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and
maintenance life cycle. This has been rated as having Low security
impact and is not currently planned to be addressed in future updates. For
additional information, refer to the Red Hat Enterprise Linux Life
Cycle: https://access.redhat.com/support/policy/updates/errata/.
Comment 7 Fedora Update System 2015-01-25 21:31:09 EST 
kernel-3.18.3-201.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 9 errata-xmlrpc 2015-06-09 10:48:53 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2015:1081 https://rhn.redhat.com/errata/RHSA-2015-1081.html
Comment 11 errata-xmlrpc 2015-09-15 05:23:26 EDT 
This issue has been addressed in the following products:

  MRG for RHEL-6 v.2

Via RHSA-2015:1787 https://rhn.redhat.com/errata/RHSA-2015-1787.html
Comment 12 errata-xmlrpc 2015-09-15 05:39:19 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:1788 https://rhn.redhat.com/errata/RHSA-2015-1788.html
Comment 13 errata-xmlrpc 2015-09-15 08:06:34 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:1778 https://rhn.redhat.com/errata/RHSA-2015-1778.html
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