PT-2021-2157 · Cisco · Cisco Anyconnect Secure Mobility Client

Marcos Accossatto + 1 · Published 2021-02-17 · Updated 2022-08-05 · CVE-2021-1366

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Cisco AnyConnect Secure Mobility Client for Windows (affected versions not specified)

Description A vulnerability in the interprocess communication (IPC) channel could allow an authenticated, local attacker to perform a DLL hijacking attack on an affected device if the VPN Posture (HostScan) Module is installed. This issue is due to insufficient validation of resources loaded by the application at run time. An attacker could exploit this by sending a crafted IPC message to the AnyConnect process, potentially allowing the execution of arbitrary code on the affected machine with SYSTEM privileges. The attacker needs valid credentials on the Windows system to exploit this vulnerability.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Verification of Cryptographic Signature

Uncontrolled Search Path Element

Weakness Enumeration

CWE-347

CWE-427

Related Identifiers

BDU:2021-01046

CVE-2021-1366

Affected Products

Cisco Anyconnect Secure Mobility Client

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2021-1366 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-dll-hijac-JrcTOQMC · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-1366 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-01046 · Security Note
• https://t.me/cybersecuritytechnologies/2759 · Telegram Post
• https://t.me/cibsecurity/23761 · Telegram Post