SB2020041604 - Multiple vulnerabilities in Cisco Wireless LAN Controller (WLC)

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Buffer overflow (CVE-ID: CVE-2020-3273)

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

The vulnerability exists due to a boundary error when processing the 802.11 Generic Advertisement Service (GAS) frames. A remote attacker can send a specially crafted 802.11 GAS frame over the air to an access point (AP), trigger memory corruption and cause a denial of service condition on the target system.

2) Input validation error (CVE-ID: CVE-2020-3262)

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

The vulnerability exists due to insufficient validation of user-supplied input in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol handler. A remote attacker can send a malformed CAPWAP packet to the application and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-gas-dos-8FsE3AWH
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-capwap-dos-Y2sD9uEw