John Heasman of NGSSoftware has discovered a high risk vulnerability in the handling of RTF documents within OpenOffice. The vulnerability affects all versions of OpenOffice prior to 2.2.1. If an attacker can coax a user into opening a specially crafted RTF document then the attacker can execute arbitrary code in the security context of their victim. Details ******* When parsing the "prtdata" tag, the OpenOffice RTF parser allocates memory based on the first proceeding token but copies the contents of the second, thus by setting the first token to a value smaller than the length of the second it is possible to overwrite heap data. This can be exploited to execute arbitrary code by overwriting vtable entries. Solution ******** This issue has now been resolved; OpenOffice users are strongly recommended to install OpenOffice 2.2.1, or obtain the latest OpenOffice packages appropriate to their distribution. Further details are available at http://www.openoffice.org NGSSoftware Insight Security Research http://www.ngssoftware.com http://www.databasesecurity.com/ http://www.nextgenss.com/ +44(0)208 401 0070 -- E-MAIL DISCLAIMER The information contained in this email and any subsequent correspondence is private, is solely for the intended recipient(s) and may contain confidential or privileged information. For those other than the intended recipient(s), any disclosure, copying, distribution, or any other action taken, or omitted to be taken, in reliance on such information is prohibited and may be unlawful. If you are not the intended recipient and have received this message in error, please inform the sender and delete this mail and any attachments. The views expressed in this email do not necessarily reflect NGS policy. NGS accepts no liability or responsibility for any onward transmission or use of emails and attachments having left the NGS domain. NGS and NGSSoftware are trading names of Next Generation Security Software Ltd. Registered office address: 52 Throwley Way, Sutton, SM1 4BF with Company Number 04225835 and VAT Number 783096402
