First published: Thu Apr 20 2017(Updated: )
A vulnerability in the TCP normalizer of Cisco Adaptive Security Appliance (ASA) Software (8.0 through 8.7 and 9.0 through 9.6) and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause Cisco ASA and FTD to drop any further incoming traffic on all interfaces, resulting in a denial of service (DoS) condition. The vulnerability is due to improper limitation of the global out-of-order TCP queue for specific block sizes. An attacker could exploit this vulnerability by sending a large number of unique permitted TCP connections with out-of-order segments. An exploit could allow the attacker to exhaust available blocks in the global out-of-order TCP queue, causing the dropping of any further incoming traffic on all interfaces and resulting in a DoS condition. Cisco Bug IDs: CSCvb46321.
Credit: ykramarz@cisco.com ykramarz@cisco.com
Affected Software | Affected Version | How to fix |
---|---|---|
Cisco Adaptive Security Appliance | =8.0.1.2 | |
Cisco Adaptive Security Appliance | =8.0.2 | |
Cisco Adaptive Security Appliance | =8.0.2.11 | |
Cisco Adaptive Security Appliance | =8.0.2.15 | |
Cisco Adaptive Security Appliance | =8.0.3 | |
Cisco Adaptive Security Appliance | =8.0.3.6 | |
Cisco Adaptive Security Appliance | =8.0.3.12 | |
Cisco Adaptive Security Appliance | =8.0.3.19 | |
Cisco Adaptive Security Appliance Software | =8.0.4 | |
Cisco Adaptive Security Appliance Software | =8.0.4.3 | |
Cisco Adaptive Security Appliance Software | =8.0.4.9 | |
Cisco Adaptive Security Appliance Software | =8.0.4.16 | |
Cisco Adaptive Security Appliance Software | =8.0.4.23 | |
Cisco Adaptive Security Appliance Software | =8.0.4.25 | |
Cisco Adaptive Security Appliance Software | =8.0.4.28 | |
Cisco Adaptive Security Appliance Software | =8.0.4.31 | |
Cisco Adaptive Security Appliance Software | =8.0.4.32 | |
Cisco Adaptive Security Appliance Software | =8.0.4.33 | |
Cisco Adaptive Security Appliance Software | =8.0.5 | |
Cisco Adaptive Security Appliance Software | =8.0.5.20 | |
Cisco Adaptive Security Appliance Software | =8.0.5.23 | |
Cisco Adaptive Security Appliance Software | =8.0.5.25 | |
Cisco Adaptive Security Appliance Software | =8.0.5.27 | |
Cisco Adaptive Security Appliance Software | =8.0.5.28 | |
Cisco Adaptive Security Appliance Software | =8.0.5.31 | |
Cisco Adaptive Security Appliance Software | =8.1.0.104 | |
Cisco Adaptive Security Appliance Software | =8.1.1 | |
Cisco Adaptive Security Appliance Software | =8.1.1.6 | |
Cisco Adaptive Security Appliance Software | =8.1.2 | |
Cisco Adaptive Security Appliance Software | =8.1.2.13 | |
Cisco Adaptive Security Appliance Software | =8.1.2.15 | |
Cisco Adaptive Security Appliance Software | =8.1.2.16 | |
Cisco Adaptive Security Appliance Software | =8.1.2.19 | |
Cisco Adaptive Security Appliance Software | =8.1.2.23 | |
Cisco Adaptive Security Appliance Software | =8.1.2.24 | |
Cisco Adaptive Security Appliance Software | =8.1.2.49 | |
Cisco Adaptive Security Appliance Software | =8.1.2.50 | |
Cisco Adaptive Security Appliance Software | =8.1.2.55 | |
Cisco Adaptive Security Appliance Software | =8.1.2.56 | |
Cisco Adaptive Security Appliance Software | =8.2.0.45 | |
Cisco Adaptive Security Appliance Software | =8.2.1 | |
Cisco Adaptive Security Appliance Software | =8.2.1.11 | |
Cisco Adaptive Security Appliance Software | =8.2.2 | |
Cisco Adaptive Security Appliance Software | =8.2.2.9 | |
Cisco Adaptive Security Appliance Software | =8.2.2.10 | |
Cisco Adaptive Security Appliance Software | =8.2.2.12 | |
Cisco Adaptive Security Appliance Software | =8.2.2.16 | |
Cisco Adaptive Security Appliance Software | =8.2.2.17 | |
Cisco Adaptive Security Appliance Software | =8.2.3 | |
Cisco Adaptive Security Appliance Software | =8.2.4 | |
Cisco Adaptive Security Appliance Software | =8.2.4.1 | |
Cisco Adaptive Security Appliance Software | =8.2.4.4 | |
Cisco Adaptive Security Appliance Software | =8.2.5 | |
Cisco Adaptive Security Appliance Software | =8.2.5.13 | |
Cisco Adaptive Security Appliance Software | =8.2.5.22 | |
Cisco Adaptive Security Appliance Software | =8.2.5.26 | |
Cisco Adaptive Security Appliance Software | =8.2.5.33 | |
Cisco Adaptive Security Appliance Software | =8.2.5.40 | |
Cisco Adaptive Security Appliance Software | =8.2.5.41 | |
Cisco Adaptive Security Appliance Software | =8.2.5.46 | |
Cisco Adaptive Security Appliance Software | =8.2.5.48 | |
Cisco Adaptive Security Appliance Software | =8.2.5.50 | |
Cisco Adaptive Security Appliance Software | =8.2.5.52 | |
Cisco Adaptive Security Appliance Software | =8.2.5.55 | |
Cisco Adaptive Security Appliance Software | =8.2.5.57 | |
Cisco Adaptive Security Appliance Software | =8.2.5.59 | |
Cisco Adaptive Security Appliance Software | =8.3.1 | |
Cisco Adaptive Security Appliance Software | =8.3.1.1 | |
Cisco Adaptive Security Appliance Software | =8.3.1.4 | |
Cisco Adaptive Security Appliance Software | =8.3.1.6 | |
Cisco Adaptive Security Appliance Software | =8.3.2 | |
Cisco Adaptive Security Appliance Software | =8.3.2.4 | |
Cisco Adaptive Security Appliance Software | =8.3.2.13 | |
Cisco Adaptive Security Appliance Software | =8.3.2.23 | |
Cisco Adaptive Security Appliance Software | =8.3.2.25 | |
Cisco Adaptive Security Appliance Software | =8.3.2.31 | |
Cisco Adaptive Security Appliance Software | =8.3.2.33 | |
Cisco Adaptive Security Appliance Software | =8.3.2.34 | |
Cisco Adaptive Security Appliance Software | =8.3.2.37 | |
Cisco Adaptive Security Appliance Software | =8.3.2.39 | |
Cisco Adaptive Security Appliance Software | =8.3.2.40 | |
Cisco Adaptive Security Appliance Software | =8.3.2.41 | |
Cisco Adaptive Security Appliance Software | =8.3.2.44 | |
Cisco Adaptive Security Appliance Software | =8.4.0 | |
Cisco Adaptive Security Appliance Software | =8.4.1 | |
Cisco Adaptive Security Appliance Software | =8.4.1.3 | |
Cisco Adaptive Security Appliance Software | =8.4.1.11 | |
Cisco Adaptive Security Appliance Software | =8.4.2 | |
Cisco Adaptive Security Appliance Software | =8.4.2.1 | |
Cisco Adaptive Security Appliance Software | =8.4.2.8 | |
Cisco Adaptive Security Appliance Software | =8.4.3 | |
Cisco Adaptive Security Appliance Software | =8.4.3.8 | |
Cisco Adaptive Security Appliance Software | =8.4.3.9 | |
Cisco Adaptive Security Appliance Software | =8.4.4 | |
Cisco Adaptive Security Appliance Software | =8.4.4.1 | |
Cisco Adaptive Security Appliance Software | =8.4.4.3 | |
Cisco Adaptive Security Appliance Software | =8.4.4.5 | |
Cisco Adaptive Security Appliance Software | =8.4.4.9 | |
Cisco Adaptive Security Appliance Software | =8.4.5 | |
Cisco Adaptive Security Appliance Software | =8.4.5.6 | |
Cisco Adaptive Security Appliance Software | =8.4.6 | |
Cisco Adaptive Security Appliance Software | =8.4.7 | |
Cisco Adaptive Security Appliance Software | =8.4.7.3 | |
Cisco Adaptive Security Appliance Software | =8.4.7.15 | |
Cisco Adaptive Security Appliance Software | =8.4.7.22 | |
Cisco Adaptive Security Appliance Software | =8.4.7.23 | |
Cisco Adaptive Security Appliance Software | =8.4.7.26 | |
Cisco Adaptive Security Appliance Software | =8.4.7.28 | |
Cisco Adaptive Security Appliance Software | =8.4.7.29 | |
Cisco Adaptive Security Appliance Software | =8.5.1 | |
Cisco Adaptive Security Appliance Software | =8.5.1.1 | |
Cisco Adaptive Security Appliance Software | =8.5.1.6 | |
Cisco Adaptive Security Appliance Software | =8.5.1.7 | |
Cisco Adaptive Security Appliance Software | =8.5.1.14 | |
Cisco Adaptive Security Appliance Software | =8.5.1.17 | |
Cisco Adaptive Security Appliance Software | =8.5.1.18 | |
Cisco Adaptive Security Appliance Software | =8.5.1.19 | |
Cisco Adaptive Security Appliance Software | =8.5.1.21 | |
Cisco Adaptive Security Appliance Software | =8.5.1.24 | |
Cisco Adaptive Security Appliance Software | =8.6.1 | |
Cisco Adaptive Security Appliance Software | =8.6.1.1 | |
Cisco Adaptive Security Appliance Software | =8.6.1.2 | |
Cisco Adaptive Security Appliance Software | =8.6.1.5 | |
Cisco Adaptive Security Appliance Software | =8.6.1.10 | |
Cisco Adaptive Security Appliance Software | =8.6.1.12 | |
Cisco Adaptive Security Appliance Software | =8.6.1.13 | |
Cisco Adaptive Security Appliance Software | =8.6.1.14 | |
Cisco Adaptive Security Appliance Software | =8.6.1.17 | |
Cisco Adaptive Security Appliance Software | =8.7.1 | |
Cisco Adaptive Security Appliance Software | =8.7.1.1 | |
Cisco Adaptive Security Appliance Software | =8.7.1.3 | |
Cisco Adaptive Security Appliance Software | =8.7.1.4 | |
Cisco Adaptive Security Appliance Software | =8.7.1.7 | |
Cisco Adaptive Security Appliance Software | =8.7.1.8 | |
Cisco Adaptive Security Appliance Software | =8.7.1.11 | |
Cisco Adaptive Security Appliance Software | =8.7.1.13 | |
Cisco Adaptive Security Appliance Software | =8.7.1.16 | |
Cisco Adaptive Security Appliance Software | =8.7.1.17 | |
Cisco Adaptive Security Appliance Software | =9.0.1 | |
Cisco Adaptive Security Appliance Software | =9.0.2 | |
Cisco Adaptive Security Appliance Software | =9.0.2.10 | |
Cisco Adaptive Security Appliance Software | =9.0.3 | |
Cisco Adaptive Security Appliance Software | =9.0.3.6 | |
Cisco Adaptive Security Appliance Software | =9.0.3.8 | |
Cisco Adaptive Security Appliance Software | =9.0.4 | |
Cisco Adaptive Security Appliance Software | =9.0.4.1 | |
Cisco Adaptive Security Appliance Software | =9.0.4.5 | |
Cisco Adaptive Security Appliance Software | =9.0.4.7 | |
Cisco Adaptive Security Appliance Software | =9.0.4.17 | |
Cisco Adaptive Security Appliance Software | =9.0.4.20 | |
Cisco Adaptive Security Appliance Software | =9.0.4.24 | |
Cisco Adaptive Security Appliance Software | =9.0.4.26 | |
Cisco Adaptive Security Appliance Software | =9.0.4.29 | |
Cisco Adaptive Security Appliance Software | =9.0.4.33 | |
Cisco Adaptive Security Appliance Software | =9.0.4.35 | |
Cisco Adaptive Security Appliance Software | =9.0.4.37 | |
Cisco Adaptive Security Appliance Software | =9.0.4.40 | |
Cisco Adaptive Security Appliance Software | =9.0.4.42 | |
Cisco Adaptive Security Appliance Software | =9.1\(7\)4 | |
Cisco Adaptive Security Appliance Software | =9.1\(7\)6 | |
Cisco Adaptive Security Appliance Software | =9.1\(7\)7 | |
Cisco Adaptive Security Appliance Software | =9.1\(7\)9 | |
Cisco Adaptive Security Appliance Software | =9.1\(7\)11 | |
Cisco Adaptive Security Appliance Software | =9.1\(7\)12 | |
Cisco Adaptive Security Appliance Software | =9.1.1 | |
Cisco Adaptive Security Appliance Software | =9.1.1.4 | |
Cisco Adaptive Security Appliance Software | =9.1.2 | |
Cisco Adaptive Security Appliance Software | =9.1.2.8 | |
Cisco Adaptive Security Appliance Software | =9.1.3 | |
Cisco Adaptive Security Appliance Software | =9.1.3.2 | |
Cisco Adaptive Security Appliance Software | =9.1.4 | |
Cisco Adaptive Security Appliance Software | =9.1.4.5 | |
Cisco Adaptive Security Appliance Software | =9.1.5 | |
Cisco Adaptive Security Appliance Software | =9.1.5.10 | |
Cisco Adaptive Security Appliance Software | =9.1.5.12 | |
Cisco Adaptive Security Appliance Software | =9.1.5.15 | |
Cisco Adaptive Security Appliance Software | =9.1.5.21 | |
Cisco Adaptive Security Appliance Software | =9.1.6 | |
Cisco Adaptive Security Appliance Software | =9.1.6.1 | |
Cisco Adaptive Security Appliance Software | =9.1.6.4 | |
Cisco Adaptive Security Appliance Software | =9.1.6.6 | |
Cisco Adaptive Security Appliance Software | =9.1.6.8 | |
Cisco Adaptive Security Appliance Software | =9.1.6.10 | |
Cisco Adaptive Security Appliance Software | =9.2\(0.0\) | |
Cisco Adaptive Security Appliance Software | =9.2\(0.104\) | |
Cisco Adaptive Security Appliance Software | =9.2\(3.1\) | |
Cisco Adaptive Security Appliance Software | =9.2.1 | |
Cisco Adaptive Security Appliance Software | =9.2.2 | |
Cisco Adaptive Security Appliance Software | =9.2.2.4 | |
Cisco Adaptive Security Appliance Software | =9.2.2.7 | |
Cisco Adaptive Security Appliance Software | =9.2.2.8 | |
Cisco Adaptive Security Appliance Software | =9.2.3 | |
Cisco Adaptive Security Appliance Software | =9.2.3.3 | |
Cisco Adaptive Security Appliance Software | =9.2.3.4 | |
Cisco Adaptive Security Appliance Software | =9.2.4 | |
Cisco Adaptive Security Appliance Software | =9.2.4.2 | |
Cisco Adaptive Security Appliance Software | =9.2.4.4 | |
Cisco Adaptive Security Appliance Software | =9.2.4.8 | |
Cisco Adaptive Security Appliance Software | =9.2.4.10 | |
Cisco Adaptive Security Appliance Software | =9.2.4.13 | |
Cisco Adaptive Security Appliance Software | =9.2.4.14 | |
Cisco Adaptive Security Appliance Software | =9.2.4.16 | |
Cisco Adaptive Security Appliance Software | =9.2.4.17 | |
Cisco Adaptive Security Appliance Software | =9.3\(1.50\) | |
Cisco Adaptive Security Appliance Software | =9.3\(1.105\) | |
Cisco Adaptive Security Appliance Software | =9.3\(2.100\) | |
Cisco Adaptive Security Appliance Software | =9.3\(2.243\) | |
Cisco Adaptive Security Appliance Software | =9.3.1 | |
Cisco Adaptive Security Appliance Software | =9.3.1.1 | |
Cisco Adaptive Security Appliance Software | =9.3.2 | |
Cisco Adaptive Security Appliance Software | =9.3.2.2 | |
Cisco Adaptive Security Appliance Software | =9.3.3 | |
Cisco Adaptive Security Appliance Software | =9.3.3.1 | |
Cisco Adaptive Security Appliance Software | =9.3.3.2 | |
Cisco Adaptive Security Appliance Software | =9.3.3.5 | |
Cisco Adaptive Security Appliance Software | =9.3.3.6 | |
Cisco Adaptive Security Appliance Software | =9.3.3.9 | |
Cisco Adaptive Security Appliance Software | =9.3.3.10 | |
Cisco Adaptive Security Appliance Software | =9.3.3.11 | |
Cisco Adaptive Security Appliance Software | =9.3.5 | |
Cisco Adaptive Security Appliance Software | =9.4.0.115 | |
Cisco Adaptive Security Appliance Software | =9.4.1 | |
Cisco Adaptive Security Appliance Software | =9.4.1.1 | |
Cisco Adaptive Security Appliance Software | =9.4.1.2 | |
Cisco Adaptive Security Appliance Software | =9.4.1.3 | |
Cisco Adaptive Security Appliance Software | =9.4.1.5 | |
Cisco Adaptive Security Appliance Software | =9.4.2 | |
Cisco Adaptive Security Appliance Software | =9.4.2.3 | |
Cisco Adaptive Security Appliance Software | =9.4.3 | |
Cisco Adaptive Security Appliance Software | =9.4.3.3 | |
Cisco Adaptive Security Appliance Software | =9.4.3.4 | |
Cisco Adaptive Security Appliance Software | =9.4.3.6 | |
Cisco Adaptive Security Appliance Software | =9.4.3.8 | |
Cisco Adaptive Security Appliance Software | =9.4.3.11 | |
Cisco Adaptive Security Appliance Software | =9.4.3.12 | |
Cisco Adaptive Security Appliance Software | =9.4.4 | |
Cisco Adaptive Security Appliance Software | =9.5.1 | |
Cisco Adaptive Security Appliance Software | =9.5.2 | |
Cisco Adaptive Security Appliance Software | =9.5.2.6 | |
Cisco Adaptive Security Appliance Software | =9.5.2.10 | |
Cisco Adaptive Security Appliance Software | =9.5.2.14 | |
Cisco Adaptive Security Appliance Software | =9.5.3 | |
Cisco Adaptive Security Appliance Software | =9.5.3.2 | |
Cisco Adaptive Security Appliance Software | =9.5.3.3 | |
Cisco Adaptive Security Appliance Software | =9.6.0 | |
Cisco Adaptive Security Appliance Software | =9.6.1 | |
Cisco Adaptive Security Appliance Software | =9.6.1.3 | |
Cisco Adaptive Security Appliance Software | =9.6.1.5 | |
Cisco Adaptive Security Appliance Software | =9.6.1.10 | |
Cisco Adaptive Security Appliance Software | =9.6.2 | |
Cisco Adaptive Security Appliance Software | =9.6.2.1 | |
Cisco Adaptive Security Appliance Software | =9.6.2.2 | |
Cisco Adaptive Security Appliance Software | =9.6.2.3 | |
Cisco Adaptive Security Appliance Software | =8.0.1.2 | |
Cisco Adaptive Security Appliance Software | =8.0.2 | |
Cisco Adaptive Security Appliance Software | =8.0.2.11 | |
Cisco Adaptive Security Appliance Software | =8.0.2.15 | |
Cisco Adaptive Security Appliance Software | =8.0.3 | |
Cisco Adaptive Security Appliance Software | =8.0.3.6 | |
Cisco Adaptive Security Appliance Software | =8.0.3.12 | |
Cisco Adaptive Security Appliance Software | =8.0.3.19 |
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CVE-2017-3793 has a critical severity rating, potentially allowing an unauthenticated remote attacker to disrupt network traffic.
To fix CVE-2017-3793, upgrade your Cisco Adaptive Security Appliance or Firepower Threat Defense software to a version that addresses this vulnerability.
CVE-2017-3793 affects Cisco Adaptive Security Appliance Software versions 8.0 through 8.7 and 9.0 through 9.6.
Yes, CVE-2017-3793 can be exploited remotely by unauthorized attackers without authentication.
The impact of CVE-2017-3793 is that it can cause the Cisco ASA and FTD devices to drop all incoming traffic, leading to a denial of service.