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ESTsoft ALTools Updater Insecure File Permissions Privilege Escalation

Posted on 30 November -0001

<HTML><HEAD><TITLE>ESTsoft ALTools Updater Insecure File Permissions Privilege Escalation</TITLE><META http-equiv="Content-Type" content="text/html; charset=utf-8"></HEAD><BODY># Exploit Title: ESTsoft ALTools Updater Insecure File Permissions Privilege Escalation
# Date: 26/09/2016
# Exploit Author: zaeek@protonmail.com
# Vendor Homepage: http://www.estsoft.com/
# Version: 10.4.26.1
# Tested on: Windows 7 32/64bit

====Description====

ESTsoft ALTools Updater for Windows lacks of proper file permissions, creating a vector for privilege escalation attack.
To properly exploit this vulnerability, the local attacker must overwrite the vulnerable file(s) with his malicious ones, as he has full Read/Write rights to the given file.

====Proof-of-Concept====

C:Program FilesESTsoftALUpdate>icacls ALUpdate.exe
ALUpdate.exe BUILTINUsers:(I)(F)
             NT AUTHORITYSYSTEM:(I)(F)
             BUILTINAdministrators:(I)(F)

Successfully processed 1 files; Failed processing 0 files

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