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CVE-2019-15256

HIGHCVSS 8.6/10EPSS 1.97%

Last modified

CVE-2019-15256 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. 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. EPSS estimates a 1.97% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS Probability
1.97%

77.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoAdaptive Security Appliance Software>= 9.7, < 9.8.4.10
CiscoAdaptive Security Appliance Software>= 9.9, < 9.9.2.47
CiscoAdaptive Security Appliance Software>= 9.10, < 9.10.1.30
CiscoAdaptive Security Appliance Software>= 9.12, < 9.12.2.5
CiscoFirepower Threat Defense>= 6.2.0, < 6.2.3.11
CiscoFirepower Threat Defense>= 6.3.0, < 6.3.0.2
CiscoAsa 5505 Firmware9.9\(2.4\)
CiscoAsa 5505 Firmware201.4\(1.21\)
CiscoAsa 5510 Firmware9.9\(2.4\)
CiscoAsa 5510 Firmware201.4\(1.21\)
CiscoAsa 5512-X Firmware9.9\(2.4\)
CiscoAsa 5512-X Firmware201.4\(1.21\)
CiscoAsa 5515-X Firmware9.9\(2.4\)
CiscoAsa 5515-X Firmware201.4\(1.21\)
CiscoAsa 5520 Firmware9.9\(2.4\)
CiscoAsa 5520 Firmware201.4\(1.21\)
CiscoAsa 5525-X Firmware9.9\(2.4\)
CiscoAsa 5525-X Firmware201.4\(1.21\)
CiscoAsa 5540 Firmware9.9\(2.4\)
CiscoAsa 5540 Firmware201.4\(1.21\)
CiscoAsa 5545-X Firmware9.9\(2.4\)
CiscoAsa 5545-X Firmware201.4\(1.21\)
CiscoAsa 5550 Firmware9.9\(2.4\)
CiscoAsa 5550 Firmware201.4\(1.21\)
CiscoAsa 5555-X Firmware9.9\(2.4\)
CiscoAsa 5555-X Firmware201.4\(1.21\)
CiscoAsa 5580 Firmware9.9\(2.4\)
CiscoAsa 5580 Firmware201.4\(1.21\)

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2019-15256?
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.
How severe is CVE-2019-15256?
CVE-2019-15256 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 1.97% probability of exploitation in the next 30 days.
How do I fix CVE-2019-15256?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-15256?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST