Update: Microsoft fixes critical flaw in security products
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(InfoWorld) - MicrosoftÂ released its February set of security updates Tuesday, including critical fixes for bugs in Office and the scanning engine used by the company's security products. The security software flaw is of particular concern because it could, in theory, be very easily exploited by an attacker to run unauthorized software on a victim's PC. The bug has to do with the way that Microsoft's Malware Protection Engine, used by Windows Live One Care and Windows Defender, processes PDF files. Windows Defender is available for free and ships with Microsoft's Vista operating system. "An attacker could exploit the vulnerability by constructing a specially crafted PDF File that could potentially allow remote code execution when the target computer system receives, and the Microsoft Malware Protection Engine scans, the PDF file," Microsoft said in its bulletin on the patch. This engine is also used by Microsoft's Antigen and Windows Forefront Security products, meaning that Exchange servers running these products could also be compromised. Although there is not yet any known attack that exploits this flaw, it could become a serious problem for Windows users running Microsoft's security products, according to Amol Sarwate, vulnerability lab manager at Qualys. "These attacks are very difficult to avoid," he said. "These products run automatically in the background." Symantec rated this scanning engine flaw the most critical of the vulnerabilities patched on Tuesday. Microsoft actually released the patch for this flaw on Jan. 26, although it did not notify customers of this bug until Tuesday's bulletin, said Mark Griesi, a security program manager with the company's Trustworthy Computing group. Griesi said that there was no particular reason why Microsoft declined to notify customers of the update. But the fact that this was Microsoft's first security product patch since implementing its monthly system apparently contributed to the decision. "It was one of those first-time situations: 'Should we say something now or should we just wait,'" he said. "This time we decided to wait. We won't do it again." In total, six of Microsoft's 12 updates are rated as "critical," the other six have the less-serious rating of "important." Among the patches is a widely anticipated update for Microsoft Word , which fixes six bugs in Microsoft's word processing software. Hackers had been exploiting a number of these bugs in very targeted attacks over the past few months. The updates fix 20 bugs in total, including all four of the Word flaws that hackers had been exploiting, Griesi said. Other critical patches fix bugs in the ActiveX HTML Help control and Microsoft Data Access Components, both used by Windows, as well as flaws in Office and Internet Explorer.
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Microsoft released a security bulletin yesterday alerting computer users of a critical flaw in software that processes JPEG images.
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Microsoft on Wednesday released an update to Internet Explorer (IE) to fix a security flaw that was discovered a month ago and has since been exploited to attack users.
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Microsoft Corp. MSFT.O released on  Tuesday a patch for its latest "critical" rated security flaw  affecting its Windows, Office and developer tools software  programs.
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SEATTLE -- Microsoft released a patch for its latest &quot;critical&quot; rated security flaw affecting its Windows, Office and developer tools software programs, the company said Tuesday.
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Microsoft Corp. on Tuesday released 10 software security patches for its products, including seven it deemed critical and that could allow remote attackers to take control of systems running the company's software.
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Microsoft Corp. today released an unprecedented number of software security updates to plug flaws in its products, including seven &quot;critical&quot; defects that it said hackers could use to hijack
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Microsoft released a &quot;critical&quot; fix on Thursday for a security issue left unresolved by the Windows XP Service Pack 2. The configuration change closed a hole in the Windows firewall settings that could open
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Microsoft has fixed a critical flaw in the Windows operating system that could be used by criminals to create a self-copying computer worm attack.The software vendor released its first set of patches for 2008 on Tuesday, fixing a pair of networking flaws in the Windows kernel. Microsoft also released a second update for a less-serious&#160;Windows flaw that would allow attackers to steal passwords&#160;or run Windows software with elevated privileges.The critical bug lies in the way Windows processes networking traffic that uses IGMP (Internet Group Multicast Protocol) and MLD (Multicast Listener Discovery) protocols, which are used to send data to many systems at the same time. Microsoft says that an attacker could send specially crafted packets to a victim&#39;s machine, which could then allow the attacker to run unauthorized code on a system.Security experts say that there is no known code that exploits this flaw, but now that the patch has been posted, hackers can reverse-engineer the fix and develop their own attack code.Because IGMP is enabled in Windows XP and Vista by default, this bug could be used to create a self-copying worm attack, Microsoft said Tuesday.&quot;Theoretically this is wormable, and that&#39;s why this is rated critical,&quot; said Tim Rains, security response communications lead with Microsoft. However, Microsoft does not believe that hackers will have an easy time developing attack code that will work reliably. &quot;We&#39;ve done a thorough analysis of the vulnerability, and we&#39;ve come to the conclusion that there are several technical mitigating factors that make it unlikely to get reliable remote code execution,&quot; Rains said.Windows uses the IGMP protocol for many popular consumer applications such as streaming video, multiplayer games, and universal plug-and-play, but the protocol is usually blocked at the router. A derivative of IGMP, MLD is the multicast protocol used by IPv6 systems and is enabled on Vista by default.&quot;If it became a worm it could take over an internal network pretty quickly, or at least all the machines where multicast is enabled,&quot; said Eric Schultze, chief technology officer with Shavlik Technologies. &quot;But this one is going to be mitigated because a lot of people have blocked multicast.&quot;The critical MS08-001 update that fixes this flaw also patches a second, less-serious bug in the Windows networking stack that could be leveraged to launch a denial-of-service attack against a Windows system. This vulnerability lies in the Internet Control Message Protocol Router Discovery Protocol (ICMP RDP), which is used by Windows to find out how to communicate with the network. Because this capability is not turned on by default, Microsoft considers this to be merely an &quot;important&quot; bug.Microsoft&#39;s other Tuesday update, MS08-002, fixes an elevation of privilege flaw in the Windows Local Security Authority Subsystem Service (LSASS), used to manage account credentials in Windows.This flaw could be exploited by attackers to steal passwords or run their code with a higher level of privilege on Windows, said Schultze. &quot;The primary concern is Johnny who is a user becoming Johnny admin,&quot; he said. But if attackers were to combine an attack that exploited this flaw with another exploit that would allow them to run code on the system, then &quot;that could become a critical issue,&quot; he said.
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As part of its Patch Tuesday updates this week, Microsoft corrected 10 vulnerabilities in Windows and Office, 7 of which were deemed "critical." Three critical flaws were fixed in Excel that could allow for remote code execution, while one was fixed in Windows 2000 and Server 2003.
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Microsoft Corp.  on  Tuesday released three security patches to fix holes in its  Windows and Office software and warned one of the  vulnerabilities was "critical" because it could allow an  attacker to take over a user's computer.
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Microsoft Corp., world&#39;s largest software maker, published numerous patches to fix 21 flaws in its software applications yesterday.
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In sharp contrast to last month&#39;s barrage of critical patches, Microsoft today offered up just one &quot;important&quot; fix for users to implement in its scheduled round of security updates for November.
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Microsoft Corp. released two security fixes Tuesday that carry its most severe threat rating, including one that applies even to computers that have downloaded the company's massive security update for the Windows XP operating system.
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Microsoft Corp. put out three software patches Tuesday that fix problems carrying a "critical" rating, the company's highest threat level.
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Microsoft released 11 security updates Tuesday to&#160;fix critical flaws in its products, including a publicly known ActiveX bug that affects users of the Visual FoxPro database.In total, 17 individual software flaws were patched in the updates. Microsoft rates six updates as critical, meaning they should be installed as soon as possible, while the remaining five updates are considered &quot;important.&quot; Last month was an easier month on IT administrators, when Microsoft released just two updates.Microsoft surprised some by releasing one&#160;fewer update than expected. Last Thursday, the software vendor had said that it was&#160;readying a fix&#160;for critical VBScript and JScript flaws in Windows 2000, XP, and Windows Server 2003. That update wasn&#39;t included in this week&#39;s patches, but on Tuesday, Microsoft wouldn&#39;t confirm that it had actually dropped the update because &quot;this could put customers at risk,&quot; according a spokeswoman for the company&#39;s public relations agency.Security experts said Tuesday that the MS08-010 update, which fixes four bugs in Internet Explorer, should take top priority this week. &quot;There are four vulnerabilities within that particular patch and all of them are remote-code executable,&quot; said Jonathan Bitle, director of technical account management with Qualys.&quot;The way we&#39;re looking at it, our prioritization would put MS08-010 at the top, followed by MS08-007,&quot; said Don Leatham, director of solutions and strategy with Lumension Security.MS08-010 fixes a publicly disclosed ActiveX bug that affects Visual FoxPro users. Although hackers have already posted code showing how to exploit this vulnerability, the buggy ActiveX control is not included in Internet Explorer 7&#39;s default list of controls, so the flaw should not affect most users.The MS08-007 update fixes a critical flaw in the Windows XP and Vista WebDAV redirector software. WebDAV is a Web-based document sharing protocol. The flaw is rated important for Windows Server 2003 users.Microsoft&#39;s Office products are also a major source of patches this month. Tuesday&#39;s updates include critical fixes for Microsoft Word, Office Publisher, and Office itself. There is also a critical update for Windows&#39; Object Linking and Embedding (OLE) Automation software. The remaining updates, rated important, are for Active Directory, the Vista TCP/IP stack, the Microsoft Works file converter, and two bugs in the Internet Information Services (IIS) Web server.The Patch Tuesday updates show that client-side bugs continue to be a much higher risk than server-side vulnerabilities, said Andrew Storms, director of security operations with nCircle. &quot;One would have assumed that the IIS and Active Directory vulnerabilities would have been the most serious because they stand at the core of an enterprise and provide more critical services,&quot; he said via instant message. &quot;But with this month&#39;s patches, the hacker&#39;s best bet is to take advantage of the client-side attacks.&quot;
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Microsoft is working to patch a security flaw in its word-processing software that is being used in targeted cyberattacks.