Foxit Reader "util.printf()" Buffer Overflow

2008.05.21
Risk: High
Local: No
Remote: Yes
CWE: CWE-119


CVSS Base Score: 9.3/10
Impact Subscore: 10/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

====================================================================== Secunia Research 20/05/2008 - Foxit Reader "util.printf()" Buffer Overflow - ====================================================================== Table of Contents Affected Software....................................................1 Severity.............................................................2 Vendor's Description of Software.....................................3 Description of Vulnerability.........................................4 Solution.............................................................5 Time Table...........................................................6 Credits..............................................................7 References...........................................................8 About Secunia........................................................9 Verification........................................................10 ====================================================================== 1) Affected Software * Foxit Reader 2.3 build 2825 NOTE: Other versions may also be affected. ====================================================================== 2) Severity Rating: Highly critical Impact: From remote Where: System access ====================================================================== 3) Vendor's Description of Software "Foxit Reader is a free PDF document viewer and printer, with incredible small size (only 2.55 M download size), breezing-fast launch speed and rich feature set. Foxit Reader supports Windows Me/ 2000/XP/2003/Vista. Its core function is compatible with PDF Standard 1.7.". Product Link: http://www.foxitsoftware.com/pdf/rd_intro.php ====================================================================== 4) Description of Vulnerability Secunia Research has discovered a vulnerability in Foxit Reader, which can be exploited by malicious people to compromise a user's system. The vulnerability is caused due to a boundary error when parsing format strings containing a floating point specifier in the "util.printf()" JavaScript function. This can be exploited to cause a stack-based buffer overflow via a specially crafted PDF file. Successful exploitation allows execution of arbitrary code. ====================================================================== 5) Solution The vulnerability is fixed in upcoming version 2.3 build 2912. ====================================================================== 6) Time Table 23/04/2008 - Vendor notified. 08/05/2008 - Vendor notified again. 08/05/2008 - Vendor response. 20/05/2008 - Public disclosure. ====================================================================== 7) Credits Discovered by Dyon Balding, Secunia Research. ====================================================================== 8) References The Common Vulnerabilities and Exposures (CVE) project has assigned CVE-2008-1104 for the vulnerability. ====================================================================== 9) About Secunia Secunia offers vulnerability management solutions to corporate customers with verified and reliable vulnerability intelligence relevant to their specific system configuration: http://corporate.secunia.com/ Secunia also provides a publicly accessible and comprehensive advisory database as a service to the security community and private individuals, who are interested in or concerned about IT-security. http://secunia.com/ Secunia believes that it is important to support the community and to do active vulnerability research in order to aid improving the security and reliability of software in general: http://corporate.secunia.com/secunia_research/33/ Secunia regularly hires new skilled team members. Check the URL below to see currently vacant positions: http://secunia.com/secunia_vacancies/ Secunia offers a FREE mailing list called Secunia Security Advisories: http://secunia.com/secunia_security_advisories/ ====================================================================== 10) Verification Please verify this advisory by visiting the Secunia website: http://secunia.com/secunia_research/2008-18/ Complete list of vulnerability reports published by Secunia Research: http://secunia.com/secunia_research/ ======================================================================


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