Vulnerability identifier: #VU57102

Vulnerability risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-34698

CWE-ID: CWE-401

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco AsyncOS for Web Security Appliances
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Cisco Systems, Inc

Description
The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak in the proxy service. A remote attacker can force the application to leak memory and perform denial of service attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco AsyncOS for Web Security Appliances: 12.0 - 14.0

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-dos-fmHdKswk

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.