Inshell Security Advisory http://www.inshell.net 1. ADVISORY INFORMATION ----------------------- Product: Photodex ProShow Producer Vendor URL: www.photodex.com Type: Incorrect Default Permissions [CWE-276] Date found: 2013-03-18 Date published: 2013-03-19 CVSSv2 Score: 7,2 (AV:L/AC:L/Au:N/C:C/I:C/A:C) CVE: - 2. CREDITS ---------- This vulnerability was discovered and researched by Julien Ahrens from Inshell Security. 3. VERSIONS AFFECTED -------------------- Photodex ProShow Producer v5.0.3310, older versions may be affected too. 4. VULNERABILITY DESCRIPTION ---------------------------- A local privilege escalation vulnerability has been identified in Photodex ProShow Producer v5.0.3310. Insecure file permissions on the executable file "scsiaccess.exe", which is used by the application service "ScsiAccess" under the SYSTEM account, may allow a less privileged user to gain access to SYSTEM privileges. A local attacker or compromised process is able to replace the original application binary with a malicious application which will be executed by a victim user or after a ScsiAccess service restart. Tested on: Microsoft Windows 7 Ultimate 64 Bit (EN) Microsoft Windows 8 Enterprise 32 Bit (EN) 5. PROOF-OF-CONCEPT (Code / Exploit) ------------------------------------ c:\Program Files\Photodex\ProShow Producer>icacls scsiaccess.exe scsiaccess.exe NT AUTHORITY\SYSTEM:(I)(F) BUILTIN\Administrators:(I)(F) BUILTIN\Users:(I)(RX) WIN-OOQCQK1QQ1L\blubb:(I)(F) APPLICATION PACKAGE AUTHORITY\ALL APPLICATION PACKAGES:(I)(RX) Everyone:(I)(F) For further Screenshots and/or PoCs visit: http://security.inshell.net/advisory/49 6. SOLUTION ----------- None 7. REPORT TIMELINE ------------------ 2013-03-18: Discovery of the vulnerability 2013-03-19: Full Disclosure because the vendor ignored previous reports. 8. REFERENCES ------------- http://security.inshell.net/advisory/49