CVSNT 2.0.51d Privilege Escalation
Posted on 25 October 2016
[+] Credits: John Page aka hyp3rlinx [+] Website: hyp3rlinx.altervista.org [+] Source: http://hyp3rlinx.altervista.org/advisories/CVSNT-PRIVILEGE-ESCALATION.txt [+] ISR: ApparitionSec Vendor: ====================== www.march-hare.com www.wincvs.org cvsgui.sourceforge.net Product: ============== CVSNT v2.0.51d Is part of "WinCvs" install zip archive. The CVSNT Versioning System implements a version control system: it keeps track of all changes in a set of files, typically the implementation of a software project, and allows several (potentially geographically separated) developers to collaborate. It is compatible with and originally based on Concurrent Versions System (CVS), which has become popular in the open-source world. from "Install.txt" ... Run wincvs_setup.exe to install WinCvs. It will also run CVSNT installer after completion. Run cvsnt_setup.exe to setup CVSNT only. Vulnerability Type: ===================== Privilege Escalation CVE Reference: ============== N/A Vulnerability Details: ===================== CVSNT installs a service with an unquoted service path running with SYSTEM privileges, to exploit a local attacker must place a malicious executable file named "Program.exe" in the path of the service. After service restart or system reboot, it could potentially allow an authorized local user to execute arbitrary code with elevated privileges on the system. Proof: ====== C:Usershyp3rlinx>sc qc CVSLock [SC] QueryServiceConfig SUCCESS SERVICE_NAME: CVSLock TYPE : 10 WIN32_OWN_PROCESS START_TYPE : 2 AUTO_START ERROR_CONTROL : 1 NORMAL BINARY_PATH_NAME : C:Program Files (x86)cvsntcvslock.exe LOAD_ORDER_GROUP : TAG : 0 DISPLAY_NAME : CVSNT Locking Service DEPENDENCIES : SERVICE_START_NAME : LocalSystem 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
