A vulnerability in the common Session Initiation Protocol (SIP) library of Cisco IOS and IOS XE Software could allow an unauthenticated, remote malicious user to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient sanity checks on an internal data structure. An attacker could exploit this vulnerability by sending a sequence of malicious SIP messages to an affected device. An exploit could allow the malicious user to cause a NULL pointer dereference, resulting in a crash of the iosd process. This triggers a reload of the device.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
cisco ios_xe 15.6\\(1\\)s4.2 |
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cisco ios_xe 16.3.8 |
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cisco ios_xe 16.9.1 |
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