Vulnerability identifier: #VU15359

Vulnerability risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-15383

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Adaptive Security Appliance 5516-X
Hardware solutions / Firmware
Adaptive Security Appliance 5508-X
Hardware solutions / Firmware
Adaptive Security Appliance 5506W-X
Hardware solutions / Firmware
Adaptive Security Appliance 5506H-X
Hardware solutions / Firmware
Adaptive Security Appliance 5506-X
Hardware solutions / Firmware

Vendor: Cisco Systems, Inc

Description
The vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.

The weakness exists in the cryptographic hardware accelerator driver the affected devices have a limited amount of Direct Memory Access (DMA) memory and the affected software improperly handles resources in low-memory conditions. A remote attacker can send a sustained, high rate of malicious traffic to an affected device, exhaust DMA memory and cause the device to reload and result in a temporary DoS condition.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Adaptive Security Appliance 5516-X: 9.4.4

Adaptive Security Appliance 5508-X: 9.4.4

Adaptive Security Appliance 5506W-X: 9.4.4

Adaptive Security Appliance 5506H-X: 9.4.4

Adaptive Security Appliance 5506-X: 9.4.4

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181003-asa-dma-dos

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.