#VU54178 Uncontrolled Memory Allocation in Cisco AnyConnect Secure Mobility Client - CVE-2021-1568

Vulnerability identifier: #VU54178

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-1568

CWE-ID: CWE-789

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Cisco AnyConnect Secure Mobility Client
Client/Desktop applications / Other client software

Vendor: Cisco Systems, Inc

Description

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

The vulnerability exists due to uncontrolled memory allocation. A local user can crash the VPN Agent service when the affected application is launched.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco AnyConnect Secure Mobility Client: 4.9.00086 - 4.10.00093

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-dos-hMhyDfb8
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvx09155

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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.