Vulnerabilities > CVE-2015-6305 - Untrusted Search Path vulnerability in Cisco Anyconnect Secure Mobility Client

047910
CVSS 7.2 - HIGH
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
local
low complexity
cisco
microsoft
CWE-426
nessus
exploit available

Summary

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.

Vulnerable Configurations

Part Description Count
Application
Cisco
51
OS
Microsoft
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Leveraging/Manipulating Configuration File Search Paths
    This attack loads a malicious resource into a program's standard path used to bootstrap and/or provide contextual information for a program like a path variable or classpath. J2EE applications and other component based applications that are built from multiple binaries can have very long list of dependencies to execute. If one of these libraries and/or references is controllable by the attacker then application controls can be circumvented by the attacker. A standard UNIX path looks similar to this If the attacker modifies the path variable to point to a locale that includes malicious resources then the user unwittingly can execute commands on the attackers' behalf: This is a form of usurping control of the program and the attack can be done on the classpath, database resources, or any other resources built from compound parts. At runtime detection and blocking of this attack is nearly impossible, because the configuration allows execution.

Exploit-Db

descriptionCisco AnyConnect Secure Mobility Client 3.1.08009 - Privilege Escalation. CVE-2015-6305. Local exploit for windows platform
fileexploits/windows/local/38289.txt
idEDB-ID:38289
last seen2016-02-04
modified2015-09-22
platformwindows
port
published2015-09-22
reporterGoogle Security Research
sourcehttps://www.exploit-db.com/download/38289/
titleCisco AnyConnect Secure Mobility Client 3.1.08009 - Privilege Escalation
typelocal

Nessus

NASL familyWindows
NASL idCISCO_ANYCONNECT_4_1_6020.NASL
descriptionThe Cisco AnyConnect Secure Mobility Client installed on the remote host is version 3.x prior to 3.1.11004.0 or 4.x prior to 4.1.6020.0. It is, therefore, affected by an untrusted search path flaw in the CMainThread::launchDownloader method due to a failure to check the path to the downloader application and associated DLL files. An authenticated, local attacker can exploit this, via running the downloader application from outside its expected location and providing crafted DLLs, to execute arbitrary commands on the host with privileges equivalent to the SYSTEM account. Note that this vulnerability resulted from an incomplete fix for CVE-2015-4211.
last seen2020-06-01
modified2020-06-02
plugin id86302
published2015-10-06
reporterThis script is Copyright (C) 2015-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/86302
titleCisco AnyConnect Secure Mobility Client 3.x < 3.1.11004.0 / 4.x < 4.1.6020.0 Privilege Escalation