Untrusted search path vulnerability in the CMainThread::launchDownloader function in vpndownloader.exe in Cisco AnyConnect Secure Mobility Client 2.0 through 4.1 on Windows allows local users to gain privileges via a Trojan horse DLL in the current working directory, as demonstrated by dbghelp.dll, aka Bug ID CSCuv01279. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-4211.

References

• https://nvd.nist.gov/vuln/detail/CVE-2015-6305
• https://code.google.com/p/google-security-research/issues/detail?id=460
• https://www.exploit-db.com/exploits/38289/
• http://packetstormsecurity.com/files/133876/Cisco-AnyConnect-Secure-Mobility-Client-3.1.08009-Privilege-Elevation.html
• http://seclists.org/fulldisclosure/2015/Sep/80
• http://tools.cisco.com/security/center/viewAlert.x?alertId=41136
• http://www.securitytracker.com/id/1033643