Multiple vulnerabilities in Cisco AnyConnect Secure Mobility Client for Windows



Published: 2020-08-06
Risk Low
Patch available YES
Number of vulnerabilities 3
CVE ID CVE-2020-3433
CVE-2020-3434
CVE-2020-3435
CWE ID CWE-427
CWE-20
Exploitation vector Local
Public exploit Public exploit code for vulnerability #1 is available.
Public exploit code for vulnerability #2 is available.
Public exploit code for vulnerability #3 is available.
Vulnerable software
Subscribe
Cisco AnyConnect Secure Mobility Client
Client/Desktop applications / Other client software

Vendor Cisco Systems, Inc

Security Advisory

1) Insecure DLL loading

Risk: Low

CVSSv3: 7 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-3433

CWE-ID: CWE-427 - Uncontrolled Search Path Element

Exploit availability: Yes [Search exploit]

Description

The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to the application loads DLL libraries in an insecure manner in the interprocess communication (IPC) channel. A local user can send a specially crafted IPC message to the AnyConnect process and execute arbitrary code on victim's system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco AnyConnect Secure Mobility Client: 4.8(0)

CPE External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-dll-F26WwJW

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

2) Input validation error

Risk: Low

CVSSv3: 5 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-3434

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: Yes [Search exploit]

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the interprocess communication (IPC) channel. A local user can send a specially crafted IPC message to the AnyConnect process and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco AnyConnect Secure Mobility Client: 4.8(0)

CPE External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-dos-feXq4tAV

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

3) Input validation error

Risk: Low

CVSSv3: 5 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:P/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-3435

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: Yes [Search exploit]

Description

The vulnerability allows a local user to overwrite VPN profiles on the targt device.

The vulnerability exists due to insufficient validation of user-supplied input in the interprocess communication (IPC) channel. A local user can send a specially crafted IPC message to the AnyConnect process and modify VPN profile files.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco AnyConnect Secure Mobility Client: 4.8(0)

CPE External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-profile-7u3PERKF

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.