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- >From: Microsoft Product Security Notification Service
- [mailto:MICROSOFT_SECURITY@ANNOUNCE.MICROSOFT.COM] On Behalf Of
- Microsoft Product Security
- Sent: Wednesday, December 23, 1998 9:51 AM
- To: MICROSOFT_SECURITY@ANNOUNCE.MICROSOFT.COM
- Subject: Microsoft Security Bulletin (MS98-020)
-
-
- The following is a Security Bulletin from the Microsoft Product Security
- Notification Service.
-
- Please do not reply to this message, as it was sent from an unattended
- mailbox.
- ********************************
-
- Microsoft Security Bulletin (MS98-020)
- --------------------------------------
-
- Patch Available for "Frame Spoof" Vulnerability
-
- Originally Posted: December 23, 1998
-
- Summary
- =======
- Microsoft has released a patch that fixes a vulnerability in Microsoft(r)
- Internet Explorer(r) that could allow a malicious web site operator to
- impersonate a window on a legitimate web site. The threat posed by this
- vulnerability is that the bogus window could collect information from the
- user and send it back to the malicious site.
-
- A fully supported patch is available for this vulnerability, and Microsoft
- recommends that all customers download and install it to protect their
- computers.
-
- Issue
- =====
- This vulnerability exists because Internet Explorer's cross domain
- protection does not extend to navigation of frames. This makes it possible
- for a malicious web site to insert content into a frame within another web
- site's window. If done properly, the user might not be able to tell that
- the frame contents were not from the legitimate site, and could be tricked
- into providing personal data to the malicious site. Non-secure (HTTP) and
- secure (HTTPS) sites are equally at risk from this vulnerability.
-
- While there have not been any reports of customers being adversely affected
- by these problems, Microsoft is releasing a patch to address any risks
- posed by this issue.
-
- Affected Software Versions
- ==========================
- - Microsoft Internet Explorer versions 3.X, 4.0, 4.01,
- 4.01 Service Pack 1 for Windows 95
- - Microsoft Internet Explorer versions 4.01 Service
- Pack 1 for Windows 98
- - Microsoft Internet Explorer versions 3.X, 4.0, 4.01,
- 4.01 Service Pack 1 for Windows NT 4.0
- - Microsoft Internet Explorer versions 3.X, 4.0, 4.01
- for Windows 3.1
- - Microsoft Internet Explorer versions 3.X, 4.0, 4.01
- for Windows NT 3.51
- - Microsoft Internet Explorer versions 3.X, 4.X for Macintosh
- - Microsoft Internet Explorer version 4 for UNIX on HPUX
- - Microsoft Internet Explorer version 4 for UNIX on
- Sun Solaris
-
- No other products or versions of Internet Explorer are affected
-
- What Microsoft is Doing
- =======================
- Microsoft has released a patch that fixes the problem identified. This patch
- is available for download from the sites listed below in What Customers
- Should Do.
-
- Microsoft has sent this security bulletin to customers subscribing
- to the Microsoft Product Security Notification Service (see
- http://www.microsoft.com/security/services/bulletin.asp for more
- information about this free customer service).
-
- Microsoft has published the following Knowledge Base (KB) article on this
- issue:
- - Microsoft Knowledge Base (KB) article Q167614,
- Update Available For "Frame Spoofing" Security Issue,
- http://support.microsoft.com/support/kb/articles/q167/6/14.asp
- (Note: It might take 24 hours from the original posting of
- this bulletin for the updated KB article to be visible in
- the Web-based Knowledge Base.)
-
- What Customers Should Do
- ========================
- Microsoft highly recommends that all affected customers download the updated
- patch to protect their computers. The complete URL for each affected
- software version is given below.
-
- NOTE: The patch for the "Frame Spoof" Vulnerability also includes two
- previously-released patches, for the "Untrusted Scripted Paste" and "Cross
- Frame Navigate" vulnerabilities. Customers who have not yet downloaded and
- installed these two patches need only download and apply the patch for the
- "Frame Spoof" Vulnerability. Customers who have applied either or both of
- patches should apply the patch for the "Frame Spoof" Vulnerability to
- ensure that they have the latest protection against all three
- vulnerabilities.
-
- Windows 98
- ----------
- Windows 98 customers can obtain the updated patch using Windows Update. To
- obtain this patch using Windows Update, launch Windows Update from the
- Windows Start Menu and click "Product Updates." When prompted, select 'Yes'
- to allow Windows Update to determine whether this patch and other updates
- are needed by your computer. If your computer does need this patch, you will
- find it listed under the "Critical Updates" section of the page.
-
- Internet Explorer 3.X and 4.0
- -----------------------------
- Internet Explorer 3.X and 4.0 users must first upgrade to Internet
- Explorer 4.01 with Service Pack 1, which is available at
- http://www.microsoft.com/windows/ie/download/. After installing
- the upgrade, apply the Internet Explorer 4.01 patch as discussed below.
-
- Internet Explorer 4.01
- ----------------------
- Customers using Internet Explorer 4.01 (with or without Service
- Pack 1) can obtain the patch from the Internet Explorer Security
- web site, (http://www.microsoft.com/windows/ie/security/spoof.asp).
- The patches for the Macintosh, HPUX and Solaris versions will be
- slightly delayed. When they are available, a notice will be posted
- on http://www.microsoft.com/ie/security/.
-
- More Information
- ================
- Please see the following references for more information related to this
- issue.
- - Microsoft Security Bulletin 98-020, Patch Available for "Frame
- Spoof" Vulnerability (the Web-posted version of this bulletin),
- http://www.microsoft.com/security/bulletins/ms98-020.asp.
- - Microsoft Knowledge Base (KB) article Q167614,
- Update Available For "Frame Spoof" Security Issue,
- http://support.microsoft.com/support/kb/articles/q167/6/14.asp.
-
- Acknowledgements
- ================
- Microsoft wishes to acknowledge Juan Carlos Garcia Cuartango of Spain for
- his continued assistance and input regarding variants of the Untrusted
- Scripted Paste Issue.
-
- Obtaining Support on this Issue
- ===============================
- This is a supported patch. If you have problems installing
- this patch or require technical assistance with this patch,
- please contact Microsoft Technical Support. For information
- on contacting Microsoft Technical Support, please see
- http://support.microsoft.com/support/contact/default.asp.
-
- Revisions
- =========
- - December 23, 1998: Bulletin Created
-
-
- For additional security-related information about Microsoft products,
- please visit http://www.microsoft.com/security
-
-
- ----------------------------------------------------------------------------
-
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- WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER
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- FOREGOING LIMITATION MAY NOT APPLY.
-
- (c) 1998 Microsoft Corporation. All rights reserved. Terms of Use.
-
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