Vulnerability Note VU#277400
<h2>Windows 7 and Windows Server 2008 R2 x64 fail to protect kernel memory when the Microsoft patch for meltdown is installed</h2> <p class="meta-text">Original Release date: 29 Mar 2018 | Last revised: 29 Mar 2018</p><!-- END SOCIAL BUTTONS -->
OverviewWhen the Microsoft patch for meltdown is installed on a Windows 7 x64 or Windows Server 2008 R2 x64 system, an unprivileged process may be able to read and write the entire memory space available to the Windows kernel.
The patch that Microsoft has released for meltdown on x64 versions of Windows 7 and Windows Server 2008 R2 incorrectly sets the permission bit for memory accessible from unprivileged user space. As a result, such platforms that have the meltdown patch installed, which was released in January 2018 will not properly protect the contents of system memory.
An attacker with the ability to run code on an affected platform as an unprivileged user may be able to read from and write to the entire contents of system memory.
Apply an update
This issue is addressed in the Microsoft update for CVE-2018-1038.
Vendor Information (Learn More)
Vendor Status Date Notified Date Updated Microsoft Affected – 29 Mar 2018
If you are a vendor and your product is affected, let
CVSS Metrics (Learn More)
Group Score Vector Base 6.8 AV:L/AC:L/Au:S/C:C/I:C/A:C Temporal 5.6 E:F/RL:OF/RC:C Environmental 5.6 CDP:ND/TD:H/CR:ND/IR:ND/AR:ND https://www.kb.cert.org/vuls/id/584653 http://blog.frizk.net/2018/03/total-meltdown.html https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-1038
This vulnerability was publicly reported by Ulf Frisk.
- CVE IDs:
Date Public: 27 Mar 2108 Date First Published: 29 Mar 2018 Date Last Updated: 29 Mar 2018 Document Revision: 11
If you have feedback, comments, or additional information about this vulnerability, please send us email.