Bug 1181054 (CVE-2014-9585) - CVE-2014-9585 kernel: ASLR bruteforce possible for vdso library
Summary: CVE-2014-9585 kernel: ASLR bruteforce possible for vdso library
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2014-9585
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1181056 1184896 1184897 1184898 1184899 1184901 1252883 1252884 1423407
Blocks: 1177829
TreeView+ depends on / blocked
 
Reported: 2015-01-12 09:56 UTC by Vasyl Kaigorodov
Modified: 2021-06-13 20:24 UTC (History)
36 users (show)

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.
Clone Of:
Environment:
Last Closed: 2019-06-08 02:37:44 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2015:1081 0 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2015-06-09 20:35:00 UTC
Red Hat Product Errata RHSA-2015:1778 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2015-09-15 16:03:32 UTC
Red Hat Product Errata RHSA-2015:1787 0 normal SHIPPED_LIVE Important: kernel-rt security, bug fix, and enhancement update 2015-09-15 13:22:07 UTC
Red Hat Product Errata RHSA-2015:1788 0 normal SHIPPED_LIVE Important: kernel-rt security, bug fix, and enhancement update 2015-09-15 13:38:06 UTC

Description Vasyl Kaigorodov 2015-01-12 09:56:59 UTC 
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 1 Vasyl Kaigorodov 2015-01-12 09:58:56 UTC 
The fix above is in upstream already:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/arch/x86/vdso/vma.c?id=394f56fe480140877304d342dec46d50dc823d46
Comment 2 Vasyl Kaigorodov 2015-01-12 10:00:19 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1181056]
Comment 4 Prasad Pandit 2015-01-22 12:24:03 UTC 
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 2015-01-26 02:31:09 UTC 
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 14:48:53 UTC 
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 09:23:26 UTC 
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 09:39:19 UTC 
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 12:06:34 UTC 
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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