Cisco Ios Xe 3.15.0s Denial Of Service Vulnerability
18 Aug. 2016
Double free vulnerability in Cisco IOS XE 3.15S, 3.16S, and 3.17S allows remote authenticated users to cause a denial of service (device restart) via a sequence of crafted SNMP read requests, aka Bug ID CSCux13174.
A vulnerability in the SNMP subsystem of Cisco IOS XE software could allow an authenticated, remote attacker to create a denial of service (DoS) condition.
The vulnerability is due to an attempt to double free a region of memory when processing a series of SNMP read requests that contains certain criteria for a specific object ID (OID). An attacker who can authenticate to an affected device may submit a series of valid but specially formed SNMP requests designed to trigger the vulnerability. Successful exploitation will cause the device to restart because of an attempt to access an invalid memory region.
Cisco has released software updates that address this vulnerability. Workarounds that mitigate this vulnerability are not available.