Vulnerability CVE-2019-15256


Published: 2019-10-02

Description:
A vulnerability in the Internet Key Exchange version 1 (IKEv1) feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to improper management of system memory. An attacker could exploit this vulnerability by sending malicious IKEv1 traffic to an affected device. The attacker does not need valid credentials to authenticate the VPN session, nor does the attacker's source address need to match a peer statement in the crypto map applied to the ingress interface of the affected device. An exploit could allow the attacker to exhaust system memory resources, leading to a reload of an affected device.

Type:

CWE-400

(Uncontrolled Resource Consumption ('Resource Exhaustion'))

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.8/10
6.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete
Affected software
Cisco -> Adaptive security appliance software 
Cisco -> Firepower threat defense 
Cisco -> Asa 5505 firmware 
Cisco -> Asa 5510 firmware 
Cisco -> Asa 5512-x firmware 
Cisco -> Asa 5515-x firmware 
Cisco -> Asa 5520 firmware 
Cisco -> Asa 5525-x firmware 
Cisco -> Asa 5540 firmware 
Cisco -> Asa 5545-x firmware 
Cisco -> Asa 5550 firmware 
Cisco -> Asa 5555-x firmware 
Cisco -> Asa 5580 firmware 

 References:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191002-asa-ftd-ikev1-dos

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