PT-2021-3319 · Cisco · Cisco Anyconnect Secure Mobility Client For Windows

Marcos Accossatto + 1 · Published 2021-06-16 · Updated 2022-08-05 · CVE-2021-1567

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

AV:L/AC:H/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 DLL loading mechanism 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 a race condition in the signature verification process for DLL files. An attacker could exploit this by sending crafted interprocess communication (IPC) messages to the AnyConnect process, potentially allowing the execution of arbitrary code with SYSTEM privileges. The attacker must have valid credentials on the Windows system to exploit this vulnerability.

Recommendations To resolve the issue, update the Cisco AnyConnect Secure Mobility Client for Windows to a version that includes the fix for this vulnerability. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Time Of Check To Time Of Use

Uncontrolled Search Path Element

Weakness Enumeration

CWE-367

CWE-427

Related Identifiers

BDU:2021-03112

CVE-2021-1567

Affected Products

Cisco Anyconnect Secure Mobility Client For Windows

References · 5

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-pos-dll-ff8j6dFv · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-03112 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-1567 · Security Note
• https://osv.dev/vulnerability/CVE-2021-1567 · Vendor Advisory
• https://t.me/cvenotify/34310 · Telegram Post