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Vulnerability CVE-2021-34788
Published: 2021-10-06
Description: |
A vulnerability in the shared library loading mechanism of Cisco AnyConnect Secure Mobility Client for Linux and Mac OS could allow an authenticated, local attacker to perform a shared library hijacking attack on an affected device if the VPN Posture (HostScan) Module is installed on the AnyConnect client. This vulnerability is due to a race condition in the signature verification process for shared library files that are loaded on an affected device. An attacker could exploit this vulnerability by sending a series of crafted interprocess communication (IPC) messages to the AnyConnect process. A successful exploit could allow the attacker to execute arbitrary code on the affected device with root privileges. To exploit this vulnerability, the attacker must have a valid account on the system. |
Type:
CWE-367 (Time-of-check Time-of-use (TOCTOU) Race Condition)
CVSS2 => (AV:L/AC:M/Au:N/C:C/I:C/A:C)
CVSS Base Score |
Impact Subscore |
Exploitability Subscore |
6.9/10 |
10/10 |
3.4/10 |
Exploit range |
Attack complexity |
Authentication |
Local |
Medium |
No required |
Confidentiality impact |
Integrity impact |
Availability impact |
Complete |
Complete |
Complete |
References: |
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-lib-hija-cAFB7x4q
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