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25th Jan 2012, 12:36 AM #1OPMemberWebsite's:
RobustVPS.netCentos 6 / Rhel 6 == Security hole -- Privledge esclation (CVE-2012-0056)
Thought this could be handy to make people aware..
https://rhn.redhat.com/errata/RHSA-2012-0052.html
* It was found that permissions were not checked properly in the Linux
kernel when handling the /proc/[pid]/mem writing functionality. A local,
unprivileged user could use this flaw to escalate their privileges. Refer
to Red Hat Knowledgebase article DOC-69129, linked to in the References,
for further information. (CVE-2012-0056, Important)
https://www.redhat.com/security/data...2012-0056.html
This issue did not affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 4 and 5 as it did not backport the upstream commit 198214a7ee. A future kernel update for Red Hat Enterprise MRG may address this issue. This has been addressed in Red Hat Enterprise Linux 6 via https://rhn.redhat.com/errata/RHSA-2012-0052.html.
How to test if vuln
Ref: https://access.redhat.com/kb/docs/DOC-69129
wget "https://bugzilla.redhat.com/attachment.cgi?id=556461" -O test.c
gcc test.c -o test
./test
Ksplice has an update out
Synopsis: RHSA-2012:0052-1 can now be patched using Ksplice
CVEs: CVE-2012-0056
Red Hat Security Advisory Severity: Important
Systems running Red Hat Enterprise Linux 6, CentOS 6, and Scientific
Linux 6 can now use Ksplice to patch against the latest Red Hat
Security Advisory, RHSA-2012:0052-1.
INSTALLING THE UPDATES
We recommend that all users of Ksplice Uptrack on RHEL 6, CentOS 6,
and Scientific Linux 6 install these updates. You can install these
updates by running:
# /usr/sbin/uptrack-upgrade -y
these updates will be installed automatically and you do not need to
take any additional action.
DESCRIPTION
* CVE-2012-0056: Privilege escalation in /proc/[pid]/mem writing.
It was found that permissions were not checked properly in the Linux
kernel when handling the /proc/[pid]/mem writing functionality. A
local, unprivileged user could use this flaw to escalate their
privileges. Refer to Red Hat Knowledgebase article DOC-69129 for
further information. (CVE-2012-0056, Important)
SUPPORT
Ksplice support is available at ksplice-support_ww@oracle.com.RobustVPS Reviewed by RobustVPS on . Centos 6 / Rhel 6 == Security hole -- Privledge esclation (CVE-2012-0056) Thought this could be handy to make people aware.. https://rhn.redhat.com/errata/RHSA-2012-0052.html * It was found that permissions were not checked properly in the Linux kernel when handling the /proc//mem writing functionality. A local, unprivileged user could use this flaw to escalate their privileges. Refer to Red Hat Knowledgebase article DOC-69129, linked to in the References, Rating: 5RobustVPS - RAID-10 & 1Gbps Unmetered VPS From ?2.95
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25th Jan 2012, 12:44 AM #2BannedWebsite's:
xsl.tel xsltel.comthanks for the heads up
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