RAID-DP implements double parity within RAID 6. The performance penalty of RAID-DP is typically under 2% vs a comparable RAID 4. File system requests are first written to the battery–backed NVRAM
to prevent data loss should the system lose power. Blocks are not
updated in place. Writes are aggregated and the storage controller tries
to write only complete stripes including both parity blocks. RAID-DP
provides better protection and equal or better performance than RAID 10,
and in most cases doesn't suffer from traditional RAID 6 challenges of
in-place block updating and spreads reads and writes over more disks
when compared to a RAID 6 group of same size.
Now part of RAID 6, double parity, sometimes known as row diagonal parity, like traditional RAID 6, features two sets of parity checks. Differently, the second set is not another set of points in the over-defined polynomial which characterizes the data. Rather, double parity calculates the extra parity against a different group of blocks. For example, in our graph both RAID 5 and RAID 6 consider all A-labeled
blocks to produce one or more parity blocks. However, it is fairly easy
to calculate parity against multiple groups of blocks, one can
calculate all A blocks and a permuted group of blocks.
Please help to click 1!
Tuesday, 25 September 2012
Tuesday, 11 September 2012
Security update available for Adobe Photoshop CS6
Release date: August 30, 2012
Last updated: August 31, 2012
Vulnerability identifier: APSB12-20
Priority: 3
CVE number: CVE-2012-4170, CVE-2012-0275
Platform: Windows and Macintosh
Note that Adobe Photoshop CS5.1 (12.1.1) and Adobe Photoshop CS5 (12.0.5) and earlier versions for Windows and Macintosh are not affected by these vulnerabilities. No update is required for users of Adobe Photoshop CS5.1 (12.1.1) and Adobe Photoshop CS5 (12.0.5) and earlier versions for Windows and Macintosh.
(Note: Adobe Photoshop CS5.1 (12.1.1) and Adobe Photoshop CS5 (12.0.5) and earlier versions for Windows and Macintosh are not affected by these vulnerabilities. No update is required for users of Adobe Photoshop CS5.1 (12.1.1) and Adobe Photoshop CS5 (12.0.5) and earlier versions for Windows and Macintosh.)
Adobe recommends users of Adobe Photoshop CS6 (13.0) update their product installations by following the instructions provided in the technote: http://blogs.adobe.com/photoshopdotcom/2012/08/photoshop-cs6-13-0-1-update-now-available.html.
This update addresses critical vulnerabilities in the software.
Note that Adobe Photoshop CS5.1 (12.1.1) and Adobe Photoshop CS5 (12.0.5) and earlier versions for Windows and Macintosh are not affected by these vulnerabilities. No update is required for users of Adobe Photoshop CS5.1 (12.1.1) and Adobe Photoshop CS5 (12.0.5) and earlier versions for Windows and Macintosh.
This update resolves a buffer overflow vulnerability that could lead to code execution (CVE-2012-4170).
This update resolves a buffer overflow vulnerability that could lead to code execution (CVE-2012-0275).
Last updated: August 31, 2012
Vulnerability identifier: APSB12-20
Priority: 3
CVE number: CVE-2012-4170, CVE-2012-0275
Platform: Windows and Macintosh
Summary
Adobe has released a security update for Adobe Photoshop CS6 (13.0) for Windows and Macintosh. This update addresses vulnerabilities that could allow an attacker who successfully exploits these vulnerabilities to take control of the affected system.Note that Adobe Photoshop CS5.1 (12.1.1) and Adobe Photoshop CS5 (12.0.5) and earlier versions for Windows and Macintosh are not affected by these vulnerabilities. No update is required for users of Adobe Photoshop CS5.1 (12.1.1) and Adobe Photoshop CS5 (12.0.5) and earlier versions for Windows and Macintosh.
Affected software versions
Adobe Photoshop CS6 (13.0) for Windows and Macintosh(Note: Adobe Photoshop CS5.1 (12.1.1) and Adobe Photoshop CS5 (12.0.5) and earlier versions for Windows and Macintosh are not affected by these vulnerabilities. No update is required for users of Adobe Photoshop CS5.1 (12.1.1) and Adobe Photoshop CS5 (12.0.5) and earlier versions for Windows and Macintosh.)
Solution
Adobe has released Adobe Photoshop CS6 (13.0.1) to address the vulnerabilities highlighted in this security bulletin.Adobe recommends users of Adobe Photoshop CS6 (13.0) update their product installations by following the instructions provided in the technote: http://blogs.adobe.com/photoshopdotcom/2012/08/photoshop-cs6-13-0-1-update-now-available.html.
Priority and Severity ratings
Adobe categorizes this update with the following priority rating:Product | Updated Version | Platform | Priority Rating |
---|---|---|---|
Adobe Photoshop | CS6 (13.0.1) | Windows and Macintosh | 3 |
This update addresses critical vulnerabilities in the software.
Details
Adobe has released a security update for Adobe Photoshop CS6 (13.0) for Windows and Macintosh. This update addresses vulnerabilities that could allow an attacker who successfully exploits these vulnerabilities to take control of the affected system.Note that Adobe Photoshop CS5.1 (12.1.1) and Adobe Photoshop CS5 (12.0.5) and earlier versions for Windows and Macintosh are not affected by these vulnerabilities. No update is required for users of Adobe Photoshop CS5.1 (12.1.1) and Adobe Photoshop CS5 (12.0.5) and earlier versions for Windows and Macintosh.
This update resolves a buffer overflow vulnerability that could lead to code execution (CVE-2012-4170).
This update resolves a buffer overflow vulnerability that could lead to code execution (CVE-2012-0275).
Acknowledgments
Adobe would like to thank the following individual and organization for reporting the relevant issues and for working with Adobe to help protect our customers:- Francis Provencher via Secunia SVCRP (CVE-2012-4170)
- Carsten Eiram, Secunia Research (CVE-2012-0275)
Monday, 10 September 2012
RHEL : java-1.6.0-ibm security update
1.Status :
Critical
Summary:
Updated java-1.6.0-ibm packages that fix several security issues are now available for Red Hat Enterprise Linux 5 and 6 Supplementary.
The Red Hat Security Response Team has rated this update as having critical security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Desktop Supplementary (v. 5) - i386, x86_64 Red Hat Enterprise Linux Desktop Supplementary (v. 6) - i386, x86_64 Red Hat Enterprise Linux HPC Node Supplementary (v. 6) - x86_64 Red Hat Enterprise Linux Server Supplementary (v. 5) - i386, ppc, s390x, x86_64 Red Hat Enterprise Linux Server Supplementary (v. 6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Workstation Supplementary (v. 6) - i386, x86_64
3. Description:
IBM Java SE version 6 includes the IBM Java Runtime Environment and the IBM Java Software Development Kit.
This update fixes several vulnerabilities in the IBM Java Runtime Environment and the IBM Java Software Development Kit. Detailed vulnerability descriptions are linked from the IBM Security alerts page, listed in the References section. (CVE-2012-0551, CVE-2012-1713, CVE-2012-1716, CVE-2012-1717, CVE-2012-1718, CVE-2012-1719, CVE-2012-1721, CVE-2012-1722, CVE-2012-1725)
All users of java-1.6.0-ibm are advised to upgrade to these updated packages, containing the IBM Java SE 6 SR11 release. All running instances of IBM Java must be restarted for the update to take effect.
4. Solution:
Before applying this update, make sure all previously-released errata relevant to your system have been applied.
This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at
5. Bugs fixed (http://bugzilla.redhat.com/):
829358 - CVE-2012-1717 OpenJDK: insecure temporary file permissions (JRE, 7143606)
829360 - CVE-2012-1716 OpenJDK: SynthLookAndFeel application context bypass (Swing, 7143614)
829361 - CVE-2012-1713 OpenJDK: fontmanager layout lookup code memory corruption (2D, 7143617)
829371 - CVE-2012-1719 OpenJDK: mutable repository identifiers in generated stub code (CORBA, 7143851)
829372 - CVE-2012-1718 OpenJDK: CRL and certificate extensions handling improvements (Security, 7143872)
829376 - CVE-2012-1725 OpenJDK: insufficient invokespecial <init> verification (HotSpot, 7160757)
831353 - CVE-2012-1721 Oracle JDK: unspecified vulnerability fixed in 6u33 and 7u5 (Deployment)
831354 - CVE-2012-1722 Oracle JDK: unspecified vulnerability fixed in 6u33 and 7u5 (Deployment)
831355 - CVE-2012-0551 Oracle JDK: unspecified vulnerability fixed in 6u33 and 7u5 (Deployment)
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