What causes the vulnerability? The vulnerability results because, when the SQL Server Agent creates an output file as part of a scheduled job, it does so using its own privileges rather than What is HTR? HTR is a first-generation advanced scripting technology delivered as part of IIS 2.0. A buffer overrun vulnerability that occurs in one of the Database Console Commands (DBCCs) that ship as part of SQL Server 7.0 and 2000. Web clients Web clients that are usingMDAC version 2.7 (the version that shipped with Windows XP) or later are not at risk from the vulnerability. http://blackplanetsupport.com/microsoft-security/microsoft-security-bulletin-ms02-039.html
Specifically, we have become aware of increased interest and activity surrounding chunked encoding vulnerabilities in general, and are aware of attempts to exploit similar issues on other platforms. Although Microsoft typically delivers cumulative patches for IIS, in this case we have delivered a patch that eliminates only this new vulnerability, while completing a cumulative patch. As a result, users' jobs will still be able to create output files, but only in areas where the user or the proxy account's privileges permit. In the case of Windows XP, a version of MDAC is already installed - one that isn't affected by the vulnerability - and so Internet Explorer 6.0 uses that version.
Knowledge Base article Q319733 provides additional information on this procedure. What would this enable an attacker to do? An attacker who exploited this vulnerability could use it for either of two purposes. Severity Rating: MDAC 2.1 Critical MDAC 2.5 Critical MDAC 2.6 Critical MDAC 2.7 Not affected Internet Explorer 5.01 Critical Internet Explorer 5.5 Critical Internet Explorer 6.0 Critical The above assessment is
What steps could I follow to prevent the control from being silently re-introduced onto my system? The simplest way is to make sure you have no trusted publishers, including Microsoft. The version information has the same format as that of the FullInstallVer value, x.xx.yyyy.y, where x.xx is the version number. Microsoft has long advocated that customers disable HTR on their web servers, unless there is a business-critical need for the technology. Shouldn't there be a warning message? A warning message is generated anytime there's an error associated with a digital signature (e.g., a bad signature or expired certificate) or the signer isn't trusted.
TechNet Products Products Windows Windows Server System Center Browser Office Office 365 Exchange Server SQL Server SharePoint Products Skype for Business See all products » IT Resources Resources Evaluation A security vulnerability is present in the RDS implementation, specifically, in a function called the RDS Data Stub, whose purpose it is to parse incoming HTTP requests and generate RDS commands. Although the vulnerability would grant varying degrees of control to a successful attacker, depending on the particular version in use, a server configured using any of the Microsoft security checklists or Maximum Severity Rating: Critical Recommendation: Users should install the security patch immediately.
Drawing on the CERT’s reports and conclusions, Robert C. This vulnerability could enable an attacker to do either of two things: create a program that would subsequently be executed when another user logged onto the server, or corrupt system files Although some of these items can be automated, I prefer to run them manually for a number of reasons. V1.1 (June 13, 2002): FAQ item updated.
MDAC is > a ubiquitous technology, and it is likely to be present on most > Windows systems: > > > - - It is included by default as part of DBCC's are utility programs provided as part of SQL Server 2000. What is ODBC? Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose.
http://www.microsoft.com/security This posting is provided "AS IS" with no warranties, and confers no rights. MDAC provides the underlying functionality for a number of database operations, such as connecting to remote databases and returning data to a client. It would depend on the specific way that the attacker overran the buffer. weblink What causes the vulnerability? The vulnerability results because one of the Database Console Command (DBCC) utilities provided as part of SQL Server contains unchecked buffers in the section of code that handle
Any IIS server with MDAC and all Internet Explorer clients should apply the patch immediately. Many web servers have vulnerable versions of RDS running on them. We appreciate your feedback.
The current version of the URLScan tool provides a means of blocking chunked encoding transfer requests by default. Support: Microsoft Knowledge Base article Q321599 discusses this issue and will be available approximately 24 hours after the release of this bulletin. Web client users should install the patch immediately on any system that is used for web browsing. It would not be necessary for the user to successfully authenticate to the server or to be able to issue direct commands to it in order to exploit the vulnerability.
Customers using Windows XP, or who have installed MDAC 2.7 on their systems are at no risk and do not need to take any action. Impact of vulnerability: Run code of the attacker's choice. This is a new variant of a vulnerability originally reported in Microsoft Security Bulletin MS02-038. http://blackplanetsupport.com/microsoft-security/microsoft-security-bulletin-ms02-048-download.html The fix is included in MDAC 2.8.
Microsoft is developing a new technology that will enable it to set the Kill Bit on the vulnerable version of the control without forcing users to re-author web pages containing references Knowledge Base articles can be found on the Microsoft Online Support web site.