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CVE-2017-3793

N/A
Published: April 20, 2017 at 10:00 PM UTC
Updated: June 17, 2026 at 01:18 AM UTC
1 product affected across 1 vendorAdaptive Security Appliance

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Severity
N/A
Exploit prediction
EPSS 2%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Adaptive Security Appliance· Cisco
95%
8.0.1.28.0.28.0.2.118.0.2.158.0.38.0.3.128.0.3.198.0.3.68.0.48.0.4.168.0.4.238.0.4.258.0.4.288.0.4.38.0.4.318.0.4.328.0.4.338.0.4.98.0.58.0.5.208.0.5.238.0.5.258.0.5.278.0.5.288.0.5.318.1.0.1048.1.18.1.1.68.1.28.1.2.138.1.2.158.1.2.168.1.2.198.1.2.238.1.2.248.1.2.498.1.2.508.1.2.558.1.2.568.2.0.458.2.18.2.1.118.2.28.2.2.108.2.2.128.2.2.168.2.2.178.2.2.98.2.38.2.48.2.4.18.2.4.48.2.58.2.5.138.2.5.228.2.5.268.2.5.338.2.5.408.2.5.418.2.5.468.2.5.488.2.5.508.2.5.528.2.5.558.2.5.578.2.5.598.3.18.3.1.18.3.1.48.3.1.68.3.28.3.2.138.3.2.238.3.2.258.3.2.318.3.2.338.3.2.348.3.2.378.3.2.398.3.2.48.3.2.408.3.2.418.3.2.448.4.08.4.18.4.1.118.4.1.38.4.28.4.2.18.4.2.88.4.38.4.3.88.4.3.98.4.48.4.4.18.4.4.38.4.4.58.4.4.98.4.58.4.5.68.4.68.4.78.4.7.158.4.7.228.4.7.238.4.7.268.4.7.288.4.7.298.4.7.38.5.18.5.1.18.5.1.148.5.1.178.5.1.188.5.1.198.5.1.218.5.1.248.5.1.68.5.1.78.6.18.6.1.18.6.1.108.6.1.128.6.1.138.6.1.148.6.1.178.6.1.28.6.1.58.7.18.7.1.18.7.1.118.7.1.138.7.1.168.7.1.178.7.1.38.7.1.48.7.1.78.7.1.89.0.19.0.29.0.2.109.0.39.0.3.69.0.3.89.0.49.0.4.19.0.4.179.0.4.209.0.4.249.0.4.269.0.4.299.0.4.339.0.4.359.0.4.379.0.4.409.0.4.429.0.4.59.0.4.79.1(7)119.1(7)129.1(7)49.1(7)69.1(7)79.1(7)99.1.19.1.1.49.1.29.1.2.89.1.39.1.3.29.1.49.1.4.59.1.59.1.5.109.1.5.129.1.5.159.1.5.219.1.69.1.6.19.1.6.109.1.6.49.1.6.69.1.6.89.2(0.0)9.2(0.104)9.2(3.1)9.2.19.2.29.2.2.49.2.2.79.2.2.89.2.39.2.3.39.2.3.49.2.49.2.4.109.2.4.139.2.4.149.2.4.169.2.4.179.2.4.29.2.4.49.2.4.89.3(1.105)9.3(1.50)9.3(2.100)9.3(2.243)9.3.19.3.1.19.3.29.3.2.29.3.39.3.3.19.3.3.109.3.3.119.3.3.29.3.3.59.3.3.69.3.3.99.3.59.4.0.1159.4.19.4.1.19.4.1.29.4.1.39.4.1.59.4.29.4.2.39.4.39.4.3.119.4.3.129.4.3.39.4.3.49.4.3.69.4.3.89.4.49.5.19.5.29.5.2.109.5.2.149.5.2.69.5.39.5.3.29.5.3.39.6.09.6.19.6.1.109.6.1.39.6.1.59.6.29.6.2.19.6.2.29.6.2.3

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

VDB Entryx_refsource_BIDThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/97923
VDB Entryx_refsource_SECTRACK
Source: [email protected]
http://www.securitytracker.com/id/1038329
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-asa-norm

CVSS

4.3MEDIUM[email protected]
Confidentiality
NONE
Integrity
NONE
Availability
PARTIAL
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-399CWE-400

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