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Proactive Defense: The Importance of Incident Response Planning in Cybersecurity
Rewterz Threat Advisory – CVE-2018-18559 – Linux Kernel “packet_do_bind()” Privilege Escalation Vulnerability
November 16, 2018
Rewterz Threat Advisory – Microsoft Windows Server 2012, multiple vulnerabilities
November 19, 2018
Rewterz Threat Advisory – CVE-2018-18559 – Linux Kernel “packet_do_bind()” Privilege Escalation Vulnerability
November 16, 2018
Rewterz Threat Advisory – Microsoft Windows Server 2012, multiple vulnerabilities
November 19, 2018
Multiple vulnerabilities in Microsoft Windows 8.1 are addressed in a recent update, fixing privilege escalation, information disclosure, DoS and security bypass.
IMPACT: NORMAL
PUBLISH DATE: 11-19-2018
OVERVIEW
Multiple vulnerabilities have been reported in Microsoft Windows 8.1, which can be exploited by malicious, local users to cause information disclosure, security bypass, privilege escalation and DoS (Denial of Service). Updates are available.
ANALYSIS
A number of CVE references are associated with the updates.
CVE-2018-0751
The Windows Kernel API in Windows 8.1 and RT 8.1 allows a privilege escalation vulnerability due to the way the Kernel API enforces permissions, aka “Windows Elevation of Privilege Vulnerability”.
CVE-2018-0788
The Windows Adobe Type Manager Font Driver (Atmfd.dll) allows a privilege escalation vulnerability due to the way objects are handled in memory, aka “OpenType Font Driver Elevation of Privilege Vulnerability”.
CVE-2018-0752
The Windows Kernel API allows an elevation of privilege vulnerability due to the way the Kernel API enforces permissions, aka “Windows Elevation of Privilege Vulnerability”.
CVE-2018-0749
The Microsoft Server Message Block (SMB) Server allows an elevation of privilege vulnerability due to the way SMB Server handles specially crafted files, aka “Windows Elevation of Privilege Vulnerability”.
CVE-2018-0747
The Windows kernel allows an information disclosure vulnerability due to the way memory addresses are handled, aka “Windows Information Disclosure Vulnerability”.
CVE-2018-0754
The Windows Adobe Type Manager Font Driver (Atmfd.dll) allows an information disclosure vulnerability due to the way objects are handled in memory, aka “OpenType Font Driver Information Disclosure Vulnerability”.
CVE-2018-0753
A denial of service vulnerability exists in Windows 8.1 due to the way objects are handled in memory, aka “Windows IPSec Denial of Service Vulnerability”.
CVE-2018-0748
The Windows kernel allows an elevation of privilege vulnerability due to the way memory addresses are handled, aka “Windows Elevation of Privilege Vulnerability”.
CVE-2018-0744
The Windows kernel allows a privilege escalation vulnerability due to the way objects are handled in memory, aka “Windows Elevation of Privilege Vulnerability”.
CVE-2017-5753
Systems with microprocessors utilizing speculative execution and branch prediction may allow a malicious local user to cause unauthorized information disclosure via a side-channel analysis.
CVE-2017-5715
Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis.
CVE-2017-5754
Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis of the data cache.
CVE-2018-0746
The Windows kernel contains an information disclosure vulnerability due to the way memory addresses are handled, aka “Windows Information Disclosure Vulnerability”.
Multiple vulnerabilities may appear to be similar flaws but are inherently different from one another and may have different modes of exploitation.
AFFECTED PRODUCTS
Microsoft Windows 8.1
UPDATES
Update the following versions as suggested:
- Windows 8.1 for 32-bit systems (KB4338815):
- Windows 8.1 for x64-based systems (KB4338815):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB44338815
- Windows 8.1 for 32-bit systems (KB4338824):
- Windows 8.1 for x64-based systems (KB4338824):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4338824
Note: New fixes have been released for Microsoft Windows 8.1 for the vulnerability
with the CVE identifier CVE 2017-5715 due to a regression in the previous update.
- Windows 8.1 (KB4078130):
https://www.catalog.update.microsoft.com/Search.aspx?q=KB4078130
- Windows 8.1 for 32-bit systems (KB4088879):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4088879
- Windows 8.1 for 32-bit systems (KB4088876):
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4088876
It is recommended to update the products you’re using, if any, as soon as possible.
If you think you’re the victim of a cyber-attack, immediately send an email to soc@rewterz.com.