HP TouchSmart Calendar 4.1.4245 – Insecure File Permissions Privilege Escalation
[+] Credits: John Page aka hyp3rlinx [+] Website: hyp3rlinx.altervista.org [+] Source: http://hyp3rlinx.altervista.org/advisories/HP-TOUCHSMART-CALENDAR-PRIVILEGE-ESCALATION.txt [+] ISR: ApparitionSec Vendor: ========== www.hp.com Product: =========================================== Hewlett Packard TouchSmart Calendar Service File version : 4.1.4245 HP TouchSmart Calendar is a shared calendar where you can manage your family’s schedule. You can also view scheduled events for today and tomorrow, e-mail calendar events with Google mail, and print your schedule. Vulnerability Type: ===================== Privilege Escalation CVE Reference: ============== N/A Vulnerability Details: ===================== HP Calendar Service uses weak insecure permissions settings on its files/directory as the “Everyone” group has full access on it. Allowing low privileged users to execute arbitrary code in the security context of ANY other users with elevated privileges on the affected system. Any user (even guest) will be able to replace, modify or change the file. This would allow an attacker the ability to inject code or replace the "HPTouchSmartSyncCalReminderApp.exe" executable and have it run in the context of the system. Proof... c:\Windows\System32>sc query "HP Support Assistant Service" SERVICE_NAME: HP Support Assistant Service TYPE : 10 WIN32_OWN_PROCESS STATE : 4 RUNNING (STOPPABLE, NOT_PAUSABLE, ACCEPTS_SHUTDOWN) WIN32_EXIT_CODE : 0 (0x0) SERVICE_EXIT_CODE : 0 (0x0) CHECKPOINT : 0x0 WAIT_HINT : 0x0 c:\>cacls "C:\Program Files (x86)\Hewlett-Packard\TouchSmart\Calendar\Service" C:\Program Files (x86)\Hewlett-Packard\TouchSmart\Calendar\Service Everyone:(OI)(CI)F NT AUTHORITY\SYSTEM:(OI)(CI)F Disclosure Timeline: ====================================== Vendor Notification: October 14, 2016 Vendor response: Product past warranty support October 26, 2016 : Public Disclosure Exploitation Technique: ======================= Local Severity Level: ================ Medium [+] Disclaimer The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. hyp3rlinx |