Date Discovered September 9, 2008
Description Microsoft GDI+ is prone to a heap-based buffer-overflow vulnerability because the vector graphics link library improperly processes gradient sizes.
Successfully exploiting this issue would allow an attacker to corrupt heap memory and execute arbitrary code in the context of the currently logged-in user.
Deploy network intrusion detection systems to monitor network traffic for malicious activity. Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include NOP sleds and unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from a successful exploit.
Do not accept or execute files from untrusted or unknown sources. Attackers may exploit this vulnerability through a malicious image file. Users are advised to avoid files sent in unsolicited or unexpected email attachments or instant messages.
Do not follow links provided by unknown or untrusted sources. Attackers may exploit this issue via a malicious site. Users should be wary of visiting sites of questionable integrity, especially if solicited to do so by an untrusted or unfamiliar site.
Implement multiple redundant layers of security.
Various memory-protection schemes (such as nonexecutable and randomly mapped memory segments) may hinder an attacker's ability to exploit this vulnerability to execute arbitrary code. Host-based intrusion-prevention systems may also help prevent exploits.
The vendor has released an advisory and updates. Please see the references for more information.
Credits Greg MacManus of VeriSign iDefense Labs
Copyright © Symantec Corporation.
Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from firstname.lastname@example.org
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.
Symantec, Symantec products, Symantec Security Response, and email@example.com
are registered trademarks of Symantec Corp. and/or affiliated companies in the United States and other countries. All other registered and unregistered trademarks represented in this document are the sole property of their respective companies/owners.