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Bug 1177260 - (CVE-2014-9419) CVE-2014-9419 kernel: partial ASLR bypass through TLS base addresses leak
CVE-2014-9419 kernel: partial ASLR bypass through TLS base addresses leak
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=20141208,reported=2...
: Security
Depends On: 1177263 1177353 1177354 1223330 1223331 1223723
Blocks: 1176101
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Reported: 2014-12-25 08:36 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 changed certain segment registers and thread-local storage (TLS) during a context switch. A local, unprivileged user could use this flaw to leak the user space TLS base address of an arbitrary process.
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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-2015:2152 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2015-11-19 19:56:02 EST
Red Hat Product Errata RHSA-2015:2411 normal SHIPPED_LIVE Important: kernel-rt security, bug fix, and enhancement update 2015-11-19 06:24:06 EST

  None (edit)
Description Vasyl Kaigorodov 2014-12-25 08:36:17 EST 
It was found that the Linux kernel is vulnerable to an information leakage flaw in the way certain segment registers and TLS are changed during context switch.

An unprivileged user/process could use this flaw to leak other process's user space TLS base address.

Upstream fix:
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  -> https://git.kernel.org/linus/f647d7c155f069c1a068030255c300663516420e

Reference:
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  -> http://www.openwall.com/lists/oss-security/2014/12/18/17
Comment 1 Vasyl Kaigorodov 2014-12-25 08:37:40 EST 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1177263]
Comment 2 Prasad J Pandit 2014-12-26 09:05:30 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 may address this issue.

This issue has been rated as having Low security impact and is not currently planned to be addressed in future updates for Red Hat Enterprise Linux 5 and Red Hat Enterprise MRG 2.
Comment 4 Fedora Update System 2015-01-10 21:58:14 EST 
kernel-3.17.8-300.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 5 Fedora Update System 2015-01-12 19:05:49 EST 
kernel-3.17.8-200.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 12 errata-xmlrpc 2015-06-09 10:48:41 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 13 errata-xmlrpc 2015-11-19 08:04:09 EST 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:2411 https://rhn.redhat.com/errata/RHSA-2015-2411.html
Comment 14 errata-xmlrpc 2015-11-19 15:56:33 EST 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:2152 https://rhn.redhat.com/errata/RHSA-2015-2152.html
Comment 15 errata-xmlrpc 2015-11-19 18:23:40 EST 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:2152 https://rhn.redhat.com/errata/RHSA-2015-2152.html
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