SB2017110209 - Denial of service in Cisco Wireless LAN Controller
Published: November 2, 2017
Security Bulletin ID
SB2017110209
Severity
Low
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Memory leak (CVE-ID: CVE-2017-12278)
The vulnerability allows a remote authenticated attacker to cause DoS condition on the target system.The weakness exists in the Simple Network Management Protocol (SNMP) subsystem of Cisco Wireless LAN Controllers due to a memory leak after the device fails to deallocate a buffer that is used when certain MIBs are polled. A remote attacker who knows the SNMP Version 2 SNMP Read string or has valid SNMP Version 3 credentials can repeatedly poll the affected MIB object IDs (OIDs), consume available memory and cause the system to reload.
Successful exploitation of the vulnerability results in denial of service.
2) Improper input validation (CVE-ID: CVE-2017-12275)
The vulnerability allows an adjacent attacker to cause DoS condition on the target system.The weakness exists in the implementation of 802.11v Basic Service Set (BSS) Transition Management functionality in Cisco Wireless LAN Controllers due to insufficient input validation of 802.11v BSS Transition Management Response packets that an affected device receives from wireless clients. An adjacent attacker can send a malformed 802.11v BSS Transition Management Response packet and cause the device to reload.
Successful exploitation of the vulnerability results in denial of service.
Remediation
Install update from vendor's website.