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ReviewHigh

CVE-2018-0240

Cisco Adaptive Security Appliance, secure firewall threat defense, adaptive security appliance software

Multiple vulnerabilities in the Application Layer Protocol Inspection feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerabilities are due to logical errors during traffic inspection. An attacker could exploit these vulnerabilities by sending a high volume of malicious traffic across an affected device. An exploit could allow the attacker to cause a deadlock condition, resulting in a...

CVSS
8.6
EPSS
3.86%
89.4% percentile
CISA KEV
Not listed
Published
2018.04.20
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability3.86%
Technical severityCVSS 8.6

Vulnerability overview

Multiple vulnerabilities in the Application Layer Protocol Inspection feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerabilities are due to logical errors during traffic inspection. An attacker could exploit these vulnerabilities by sending a high volume of malicious traffic across an affected device. An exploit could allow the attacker to cause a deadlock condition, resulting in a...

Affected product and versions

Product
Cisco Adaptive Security Appliance, secure firewall threat defense, adaptive security appliance software
Affected versions
>= Cisco Adaptive Security Appliance, >= 6.1.0 <= 6.1.0.7, >= 6.2.0 < 6.2.0.5, >= 6.2.1 < 6.2.2.2, >= 9.6.0.0 < 9.6.4.6, >= 9.7.0.0 < 9.7.1.24, >= 9.8.0.0 < 9.8.2.24, >= 9.9.0.0 < 9.9.1.4
Fixed versions
6.2.0.5, 6.2.2.2, 9.6.4.6, 9.7.1.24, 9.8.2.24, 9.9.1.4

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Cisco Adaptive Security Appliance, secure firewall threat defense, adaptive security appliance software and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CWE
CWE-399