cisco-sa-20181003-asa-dma-dos: Cisco Adaptive Security Appliance Direct Memory Access Denial of Service Vulnerability
First published: Wed Oct 03 2018(Updated: )
A vulnerability in the cryptographic hardware accelerator driver of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a temporary denial of service (DoS) condition. The vulnerability exists because the affected devices have a limited amount of Direct Memory Access (DMA) memory and the affected software improperly handles resources in low-memory conditions. An attacker could exploit this vulnerability by sending a sustained, high rate of malicious traffic to an affected device to exhaust memory on the device. A successful exploit could allow the attacker to exhaust DMA memory on the affected device, which could cause the device to reload and result in a temporary DoS condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181003-asa-dma-dos
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco ASA Software | >=9.7=9.8<=9.9<9.9.2.18=9.6<9.6.4.14=9.5<Migrate to 9.6.4.14=9.4<9.4.4.22=9.3<Migrate to 9.4.4.22 | 9.9.2.18 9.6.4.14 Migrate to 9.6.4.14 9.4.4.22 Migrate to 9.4.4.22 |
| Cisco FTD Software |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-20181003-asa-dma-dos?
The severity of cisco-sa-20181003-asa-dma-dos is high due to the potential for unauthenticated remote attackers to cause device reloads.
How do I fix cisco-sa-20181003-asa-dma-dos?
To fix cisco-sa-20181003-asa-dma-dos, upgrade Cisco ASA Software to versions 9.9.2.18, 9.6.4.14, or 9.4.4.22.
Which devices are affected by cisco-sa-20181003-asa-dma-dos?
Devices running vulnerable versions of Cisco ASA Software and Cisco Firepower Threat Defense Software are affected by cisco-sa-20181003-asa-dma-dos.
What is the impact of cisco-sa-20181003-asa-dma-dos?
The impact of cisco-sa-20181003-asa-dma-dos is a temporary denial of service resulting from device reloads.
Is there a workaround for cisco-sa-20181003-asa-dma-dos?
There are no specific workarounds for cisco-sa-20181003-asa-dma-dos; upgrading the software is the recommended mitigation.
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