Vulnerability identifier: #VU22602

Vulnerability risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-15276

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Cisco Wireless LAN Controller
Hardware solutions / Firmware

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists in the web interface due to a failure of the HTTP parsing engine to handle specially crafted URLs. A remote authenticated attacker can send a specially crafted URL to the web interface of the affected device and cause a denial of service condition on the target system.

Conversely, an unauthenticated attacker could exploit this vulnerability by persuading a user of the web interface to click the crafted URL.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Wireless LAN Controller: 8.4 - 8.9

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191106-wlc-dos

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.