OpenOffice is an open-source desktop office suite for many of today's popular operating systems. One of the file formats that OpenOffice supports is Quattro Pro (QPRO). This format is used by Corel's QuattroPro spreadsheet application. More information is available from the following URL.
Remote exploitation of multiple buffer overflow vulnerabilities in OpenOffice, as included in various vendors' operating system distributions, allows attackers to execute arbitrary code with the privileges of the logged in user.
The first vulnerability occurs when parsing "Attribute" records from the file. Due to a lack of bounds checking during a loop that reads these records, an attacker can trigger a heap overflow by inserting more than 256 records.
The second vulnerability is nearly identical to the first one, but involves the "Font Description" record instead of the "Attribute" record.
Exploitation of these vulnerabilities results in the execution of arbitrary code with the privileges of the user opening the file. In order to exploit this vulnerability, an attacker must persuade a user to open a malicious file.
iDefense confirmed the existence of these vulnerabilities in OpenOffice version 2.3. Other versions may also be affected.
Renaming the shared library that contains the vulnerable code will prevent OpenOffice from opening QPRO files. On Fedora Core 7, the library can be found at:
Renaming this file to libsc680li.so.bak will prevent it from being loaded. In addition to preventing the use of QPRO files, this also prevents users from opening various other file formats.
The OpenOffice.org team has addressed these vulnerabilities with the release of version 2.4. For more information, consult the OOo Security Bulletin at the following URL.
The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2007-5745 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.
10/29/2007 Initial vendor notification
10/30/2007 Initial vendor response
04/17/2008 Coordinated public disclosure
These vulnerabilities were discovered by Sean Larsson (iDefense Labs) and an anonymous researcher.
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