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May 8, 2007 11:32 AM PDT
Microsoft has released its May 2007 security bulletin, which includes seven updates: All are listed as Critical. Two of the patches affect Microsoft Windows, with one critical patch specific to Internet Explorer. Three of the patches affects Microsoft Office, and include Office for Mac 2004 uses. To keep your Windows XP SP1 system secure, update to Windows XP SP2 today. All Microsoft security patches for Windows and Office software are available via Microsoft Update or via the individual bulletins detailed below.

MS07-023: Critical

Entitled "Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (934233)" this bulletin affects users of Microsoft Office 2000 through 2007, plus Office 2004 for Mac, and addresses the vulnerabilities detailed in CVE-2007-0215, CVE-2007-1203, and 2007-0214. Successful exploitation could lead to remote code execution.

MS07-024: Critical

Entitled "Vulnerabilities in Microsoft Word Could Allow Remote Code Execution (934232)" this bulletin affects users of Microsoft Office 2000 through 2003, plus Office 2004 for Mac, but does not affect Office 2007, and addresses the vulnerabilities detailed in CVE-2007-0035, CVE-2007-0870, and CVE-2007-1202 Successful exploitation could lead to remote code execution.

MS07-025: Critical

Entitled "Vulnerability in Microsoft Office Could Allow Remote Code Execution (934873)" this bulletin affects users of Microsoft Office 2000 through 2003, plus Office 2004 for Mac, but does not affect Office 2007, and addresses the vulnerability detailed in CVE-2007-1747. Successful exploitation could lead to remote code execution.

MS07-026: Critical

Entitled "Vulnerabilities in Microsoft Exchange Could Allow Remote Code Execution (931832)" this bulletin affects users of Windows Exchange 2000, Exchange Server 2003, and Exchange Server 2007, and addresses the vulnerabilities detailed in CVE-2007-0220, CVE-2007-0039, CVE-2007-1213, and CVE-2007-0221. Successful exploitation could lead to remote code execution.

MS07-027: Critical

Entitled "Cumulative Security Update for Internet Explorer (931768)" this bulletin affects users of Windows 2000 through Vista, Internet Explorer versions 5.01 through 7, and addresses the vulnerabilities detailed in CVE-2007-0942, CVE-2007-0944, CVE-2007-0945, CVE-2007-0946, CVE-2007-0947, and CVE-2007-2221. Successful exploitation could lead to remote code execution.

MS07-028: Critical

Entitled "Vulnerability in CAPICOM Could Allow Remote Code Execution (931906)" this bulletin affects users of CAPICOM and BizTalk Server 2004, but not affect BizTalk Server 2000, 2002, and 2006, and addresses the vulnerability detailed in CVE-2007-0940. Successful exploitation could lead to remote code execution.

MS07-029: Critical

Entitled "Vulnerability in Windows DNS RPC Interface Could Allow Remote Code Execution (935966)" this bulletin affects users of Windows Server 2000 and 2003, but does not affect Windows 2000, Windows XP (SP2), and Windows Vista, and addresses the vulnerability detailed in CVE-2007-1748. Successful exploitation could lead to remote code execution.

April 10, 2007 10:31 AM PDT
The dynamic DNS update mechanism within the DNS Server service in Microsoft Windows does not properly authenticate clients. This occurs with certain configurations, and can allow remote attackers to change DNS records for a web proxy server and conduct man-in-the-middle (MITM) attacks on web traffic. The can also use this flaw to conduct pharming attacks by poisoning DNS records, and cause a denial of service attack.

Additional Resources

MILW0RM: Advisory 3544

April 10, 2007 10:26 AM PDT
Versions of Microsoft Windows 2000 and Windows Server 2003 use the Web Proxy Autodiscovery Protocol (WPAD) within Internet Explorer. WPAD allows IE to locate a Web proxy's auto-config file and thus configure the browser's proxy settings. The way the system is currently implemented, a malicious user could configured a WINS or DNS proxy server on a site, then when a vulnerable IE browser connects, intercept all subsequent traffic.

Additional Resources

Microsoft: Advisory 934864

FRsirt: 1115

CNET News.com: Windows weakness can lead to network traffic hijacks

April 10, 2007 10:22 AM PDT
There's a new Microsoft Windows vulnerability being exploited across the Internet on over 100 Web sites, according to security vendor Websense. The vulnerability is caused by an unspecified error in the way Windows 2000, XP, and Vista handles animated cursors. Animated cursors allow a mouse pointer to appear animated on a Web site. The feature is often designated by the .ani suffix, but attacks for this vulnerability are not constrained by this file type so simply blocking .ani files won't necessarily protect a PC. Users need not do anything but visit a compromised site to become infected. Antivirus vendor F-Secure reports there's also a worm associated with this vulnerability.

Successful exploitation can result in memory corruption when processing cursors, animated cursors, and icons. According to Arbor Networks, the malicious code on compromised Web sites exploiting this flaw appears to be originating from the following sites, which you may want to block:

wsfgfdgrtyhgfd.net

85.255.113.4

uniq-soft.com

fdghewrtewrtyrew.biz

newasp.com.cn

To become infected, users must be using Internet Explorer 6 or 7; there is no need to click, just visiting an infected site is enough for an infection. The flaw does not affect Firefox or Opera Internet Browsers. Microsoft released a patch within its security bulletin MS07-017.

Additional Resources

Microsoft: MS07-017

Zeroday Emergency Response Team (ZERT): Unofficial patch

NIST: CVE-2007-0038

Arbor Networks: Any Ani file could infect you

Websense: Alert

F-Secure: Blog post

January 2, 2007 2:32 PM PST

There's a buffer overflow affecting both the Windows and Mac version of Apple QuickTime 7.1.3 real-time streaming protocol (rtsp). The flaw allows remote attackers to execute arbitrary code which could allow remote access and the arbitrary execution of malicious code on compromised machines. If a user clicks a very long and specially crafted QuickTime video URL, an attacker could load malicious code onto Microsoft Windows or Apple Mac OS X machines.

At this time, there is no patch available from Apple. Users should avoid clicking URLs that begin with "rstp://." One workaround within QuickTime is to disable the rtsp:// URL handler. To do so, Mac users should open QuickTime, go to Preferences, click the Advanced tab, and select Mime Settings; once there, uncheck the box next to Streaming - Streaming Movies. For Windows users, click Edit, then Preferences, and then QuickTime Preferences. Select File Types from the pull-down menu or tab options. On the File Types page click Streaming - Streaming Movies to display additional options and uncheck the box next to RSTP stream descriptor if necessary.

Additional Resources:

January 8, 2006 11:08 AM PST

This vulnerability creates a denial of service (crash) within Microsoft Internet Explorer 6 after a victim has been tricked into visiting a malicious Web page. Using the DXImageTransform.Microsoft.Gradient ActiveX object with a long (1) StartColorStr or (2) EndColorStr property, an error is generated.

Additional Resources:

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