CVE-2020-3373: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software IP Fragment Memory Leak Vulnerability
First published: Wed Oct 21 2020(Updated: )
A vulnerability in the IP fragment-handling implementation of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a memory leak on an affected device. This memory leak could prevent traffic from being processed through the device, resulting in a denial of service (DoS) condition. The vulnerability is due to improper error handling when specific failures occur during IP fragment reassembly. An attacker could exploit this vulnerability by sending crafted, fragmented IP traffic to a targeted device. A successful exploit could allow the attacker to continuously consume memory on the affected device and eventually impact traffic, resulting in a DoS condition. The device could require a manual reboot to recover from the DoS condition. Note: This vulnerability applies to both IP Version 4 (IPv4) and IP Version 6 (IPv6) traffic.
Credit: ykramarz@cisco.com ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Firepower Threat Defense | =6.6.0.1 | |
| Cisco Adaptive Security Appliance Software | =9.8.4.22 | |
| Cisco Adaptive Security Appliance Software | =9.8.4.25 | |
| Cisco Adaptive Security Appliance Software | =9.12.4.2 | |
| Cisco Adaptive Security Appliance Software | =9.12.4.3 | |
| Cisco Adaptive Security Appliance Software | =9.13.1.12 | |
| Cisco Adaptive Security Appliance Software | =9.14.1.15 |
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Reference Links
Frequently Asked Questions
What is CVE-2020-3373?
CVE-2020-3373 is a vulnerability in the IP fragment-handling implementation of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software.
What is the severity of CVE-2020-3373?
The severity of CVE-2020-3373 is high with a CVSS score of 8.6.
How can an attacker exploit CVE-2020-3373?
An unauthenticated, remote attacker can exploit CVE-2020-3373 to cause a memory leak on an affected device.
Which software versions are affected by CVE-2020-3373?
Cisco Firepower Threat Defense 6.6.0.1 and Cisco Adaptive Security Appliance Software 9.8.4.22, 9.8.4.25, 9.12.4.2, 9.12.4.3, 9.13.1.12, and 9.14.1.15 are affected by CVE-2020-3373.
How can I fix CVE-2020-3373?
To fix CVE-2020-3373, it is recommended to upgrade to a fixed software release.
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- agent/references
- agent/last-modified-date
- agent/tags
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- vendor/cisco
- canonical/cisco firepower threat defense
- version/cisco firepower threat defense/6.6.0.1
- canonical/cisco adaptive security appliance software
- version/cisco adaptive security appliance software/9.8.4.22
- version/cisco adaptive security appliance software/9.8.4.25
- version/cisco adaptive security appliance software/9.12.4.2
- version/cisco adaptive security appliance software/9.12.4.3
- version/cisco adaptive security appliance software/9.13.1.12
- version/cisco adaptive security appliance software/9.14.1.15