Microsoft Office PowerPoint contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code.? Updates are available.
Microsoft Office PowerPoint contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code with the privileges of the user.
This vulnerability exists due to improper handling of malformed structures within PowerPoint documents.? An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to view a malicious document.? An exploit could allow the attacker to execute arbitrary code with the privileges of the user.
Microsoft has confirmed this vulnerability in a security bulletin and released updated software.
The following Microsoft applications are vulnerable:
Office PowerPoint 2002 SP3 Office PowerPoint 2003 SP3 Office 2004 for Mac
Attackers cannot directly exploit this vulnerability and instead rely upon user interaction in order to accomplish an exploit. An attacker must convince a user to view a malicious document. An attacker would likely provide documents to users as part of e-mail messages or via public websites. Attackers may use social engineering techniques in an attempt to convince users that the document originated from a trusted source.
An exploit could allow the attacker to execute arbitrary code with the privileges of the user. Systems most at risk are end hosts on which users hold Administrator privileges and execute programs as the Administrator account. Shared user systems or terminal servers, as well as end systems that only grant users restricted privileges, may be at less risk, as any executed code would run with limited privileges.
The update available from Microsoft corrects this vulnerability by improving memory handling routines.
The Cisco Applied Intelligence team has created an Applied Mitigation Bulletin to address vulnerabilities that Microsoft disclosed in the May 2009 security bulletin release. This Cisco bulletin, which assists administrators in identifying or mitigating these vulnerabilities using Cisco devices, is available at the following link: Cisco Applied Mitigation Bulletin: Microsoft Security Bulletin Release for May 2009.
Microsoft has released a security bulletin at the following link: MS09-017?
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code with the privileges of the user.? If that user holds elevated privileges, an exploit could allow the attacker to completely compromise a vulnerable system.
This vulnerability exists due to improper handling of malformed structures within PowerPoint documents.? The processing of a document containing malicious structures could trigger memory corruption.? An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to view a malicious document.? If a user views the document, the processing of the file could trigger memory corruption, possibly allowing the attacker to execute code with the privileges of the user.
Administrators are advised to apply the applicable software updates.
Users are advised not to open unsolicited files.? Users should verify the authenticity of unexpected files from trusted sources before opening them.
Users are advised to run applications with the least necessary privileges.
Users may consider applying the Microsoft Office Isolated Conversion Environment (MOICE) to safely open Word, Excel, and PowerPoint files from untrusted sources on systems running Microsoft Office 2003 or Office 2007.
Users may consider applying the Microsoft Office File Block policy to prevent the opening of untrusted documents in Microsoft Office PowerPoint 2003.
Administrators may consider using a host-based intrusion prevention system to help mitigate the impact of an exploit.
Microsoft customers can obtain updates directly by using the links in the MS09-017 security bulletin. These updates are also distributed by Windows automatic update features and available on the Windows Update website. Microsoft Windows Server Update Services (WSUS), Systems Management Server, and System Center Configuration Manager can assist administrators in deploying software updates.
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