Si informano gli utenti che utilizzano sistemi operativi Microsoft che
\nsono stati rilasciati degli aggiornamenti critici di sicurezza. Per
\ntanto si raccomanda di provvedere, se non ancora fatto,
\nall`aggiornamento delle proprie macchine.<\/p>\n
Domenica Quartarella
\nServizio Calcolo<\/p>\n
—–BEGIN PGP SIGNED MESSAGE—–
\nHash: SHA1<\/p>\n
National Cyber Alert System<\/p>\n
Technical Cyber Security Alert TA05-312A<\/p>\n
Microsoft Windows Image Processing Vulnerabilities<\/p>\n
Original release date: November 08, 2005
\n Last revised: —
\n Source: US-CERT<\/p>\n
Systems Affected<\/p>\n
* Microsoft Windows 2000
\n * Microsoft Windows XP
\n * Microsoft Windows Server 2003<\/p>\n
For more complete information, refer to Microsoft Security Bulletin
\n MS05-053.<\/p>\n
Overview<\/p>\n
Microsoft has released updates that address critical vulnerabilities
\n in Windows graphics rendering services. A remote, unauthenticated
\n attacker exploiting these vulnerabilities could execute arbitrary code
\n or cause a denial of service on an affected system.<\/p>\n
I. Description<\/p>\n
The Microsoft Security Bulletin for November 2005 addresses multiple
\n buffer overflows in Windows image processing routines. Viewing a
\n specially crafted image from an application that uses a vulnerable
\n routine may trigger these vulnerabilities. If this application can
\n access images from remote sources, such as web sites or email, then
\n remote exploitation is possible.<\/p>\n
Further information is available in the following US-CERT
\n Vulnerability Notes:<\/p>\n
VU#300549 – Microsoft Windows Graphics Rendering Engine buffer
\n overflow vulnerability<\/p>\n
Microsoft Windows Graphics Rendering Engine contains a buffer overflow
\n that may allow a remote attacker to execute arbitrary code on a
\n vulnerable system.
\n (CVE-2005-2123)<\/p>\n
VU#433341 – Microsoft Windows vulnerable to buffer overflow via
\n specially crafted “WMF” file<\/p>\n
Microsoft Windows may be vulnerable to remote code execution via a
\n buffer overflow in the Windows Metafile image format handling.
\n (CVE-2005-2124)<\/p>\n
VU#134756 – Microsoft Windows buffer overflow in Enhanced Metafile
\n rendering API<\/p>\n
Microsoft Windows Enhanced Metafile Format image rendering routines
\n contain a buffer overflow flaw that may allow an attacker to cause a
\n denial-of-service condition.
\n (CVE-2005-0803)<\/p>\n
III. Solution<\/p>\n
Apply Updates<\/p>\n
Microsoft has provided the updates to correct these vulnerabilities in
\n Microsoft Security Bulletin MS05-053. These updates are also available
\n on the Microsoft Update site.<\/p>\n
II. Impact<\/p>\n
A remote, unauthenticated attacker exploiting these vulnerabilities
\n could execute arbitrary code with the privileges of the user. If the
\n user is logged on with administrative privileges, the attacker could
\n take control of an affected system. An attacker may also be able to
\n cause a denial of service.<\/p>\n
Appendix A. References<\/p>\n
* Microsoft Security Bulletin MS05-053 – * Microsoft Security Bulletin Summary for November 2005 – * US-CERT Vulnerability Note VU#300549 – * US-CERT Vulnerability Note VU#433341 – * US-CERT Vulnerability Note VU#134756 – * Microsoft Update – <update.microsoft.com\/microsoftupdate<\/a>><\/p>\n _________________________________________________________________<\/p>\n The most recent version of this document can be found at:<\/p>\n <www.us-cert.gov\/cas\/techalerts\/TA05-312A.html<\/a>> Feedback can be directed to US-CERT. Please send email to: Revision History<\/p>\n Nov 08, 2005: Initial release Produced 2005 by US-CERT, a government organization.<\/p>\n Terms of use<\/p>\n
\n <www.microsoft.com\/technet\/security\/bulletin\/MS05-053.mspx<\/a>><\/p>\n
\n <www.microsoft.com\/technet\/security\/bulletin\/ms05-nov.mspx<\/a>><\/p>\n
\n <www.kb.cert.org\/vuls\/id\/300549<\/a>><\/p>\n
\n <www.kb.cert.org\/vuls\/id\/433341<\/a>><\/p>\n
\n <www.kb.cert.org\/vuls\/id\/134756<\/a>><\/p>\n
\n _________________________________________________________________<\/p>\n
\n <cert@cert.org<\/a>> with “TA05-312A Feedback VU#300549” in the subject.
\n _________________________________________________________________<\/p>\n
\n _________________________________________________________________<\/p>\n