Cisco IOS 12.2, 12.4, 15.0, 15.1, 15.2, 15.3, and 15.4 and IOS XE 2.5.x, 2.6.x, 3.1.xS through 3.12.xS before 3.12.3S, 3.2.xE through 3.7.xE before 3.7.1E, 3.3.xSG, 3.4.xSG, and 3.13.xS before 3.13.2S allow remote attackers to cause a denial of service (memory consumption and device reload) by sending malformed IKEv2 packets over (1) IPv4 or (2) IPv6, aka Bug ID CSCuo75572.

Devices running Cisco IOS Software or IOS XE Software contain vulnerabilities within the Internet Key Exchange (IKE) version 2 subsystem that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerabilities are due to how an affected device processes certain malformed IKEv2 packets. An attacker could exploit these vulnerabilities by sending malformed IKEv2 packets to an affected device to be processed. A successful exploit could allow the attacker to cause a reload of the affected device or excessive consumption of resources that would lead to a DoS condition. IKEv2 is automatically enabled on devices running Cisco IOS and Cisco IOS XE Software when the Internet Security Association and Key Management Protocol (ISAKMP) is enabled. These vulnerabilities can only be triggered by sending malformed IKEv2 packets. 

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According to its self-reported version, the Cisco IOS XE software running on the remote device is affected by a denial of service vulnerability in the Internet Key Exchange version 2 (IKEv2) subsystem due to improper handling of specially crafted IKEv2 packets. A remote, unauthenticated attacker can exploit this issue to cause a device reload or exhaust memory resources.

Note that this issue only affects devices with IKEv1 or ISAKMP enabled.

According to its self-reported version, the Cisco IOS software running on the remote device is affected by a denial of service vulnerability in the Internet Key Exchange version 2 (IKEv2) subsystem due to improper handling of specially crafted IKEv2 packets. A remote, unauthenticated attacker can exploit this issue to cause a device reload or exhaust memory resources.

Note that this issue only affects devices with IKEv1 or ISAKMP enabled.

ID	Name	Product	Family	Type	Severity
501828	Rockwell Automation Stratix 5900 (CVE-2015-0643)	Tenable OT Security	Tenable.ot	Remote	high
82575	Cisco IOS XE IKEv2 DoS (cisco-sa-20150325-ikev2)	Nessus	CISCO	Combined	high
82574	Cisco IOS IKEv2 DoS (cisco-sa-20150325-ikev2)	Nessus	CISCO	Combined	high

Detections

Analytics

CVE-2015-0643

high

Tenable Plugins

high

high

high