ID CVE-2020-3153
Summary A vulnerability in the installer component of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated local attacker to copy user-supplied files to system level directories with system level privileges. The vulnerability is due to the incorrect handling of directory paths. An attacker could exploit this vulnerability by creating a malicious file and copying the file to a system directory. An exploit could allow the attacker to copy malicious files to arbitrary locations with system level privileges. This could include DLL pre-loading, DLL hijacking, and other related attacks. To exploit this vulnerability, the attacker needs valid credentials on the Windows system.
References
Vulnerable Configurations
  • cpe:2.3:a:cisco:anyconnect_secure_mobility_client:-:*:*:*:*:windows:*:*
    cpe:2.3:a:cisco:anyconnect_secure_mobility_client:-:*:*:*:*:windows:*:*
  • cpe:2.3:a:cisco:anyconnect_secure_mobility_client:4.8.00175:*:*:*:*:windows:*:*
    cpe:2.3:a:cisco:anyconnect_secure_mobility_client:4.8.00175:*:*:*:*:windows:*:*
  • cpe:2.3:a:cisco:anyconnect_secure_mobility_client:4.8.01090:*:*:*:*:windows:*:*
    cpe:2.3:a:cisco:anyconnect_secure_mobility_client:4.8.01090:*:*:*:*:windows:*:*
CVSS
Base: 4.9 (as of 01-01-2022 - 19:39)
Impact:
Exploitability:
CWE CWE-427
CAPEC
  • Leveraging/Manipulating Configuration File Search Paths
    This pattern of attack sees an adversary load a malicious resource into a program's standard path so that when a known command is executed then the system instead executes the malicious component. The adversary can either modify the search path a program uses, like a PATH variable or classpath, or they can manipulate resources on the path to point to their malicious components. 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.
  • Search Order Hijacking
    An adversary exploits a weakness in an application's specification of external libraries to exploit the functionality of the loader where the process loading the library searches first in the same directory in which the process binary resides and then in other directories. Exploitation of this preferential search order can allow an attacker to make the loading process load the adversary's rogue library rather than the legitimate library. This attack can be leveraged with many different libraries and with many different loading processes. No forensic trails are left in the system's registry or file system that an incorrect library had been loaded.
Access
VectorComplexityAuthentication
LOCAL LOW NONE
Impact
ConfidentialityIntegrityAvailability
NONE COMPLETE NONE
cvss-vector via4 AV:L/AC:L/Au:N/C:N/I:C/A:N
refmap via4
cisco 20200219 Cisco AnyConnect Secure Mobility Client for Windows Uncontrolled Search Path Vulnerability
fulldisc 20200421 Cisco AnyConnect elevation of privileges due to insecure handling of path names
misc
Last major update 01-01-2022 - 19:39
Published 19-02-2020 - 20:15
Last modified 01-01-2022 - 19:39
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