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CVE Record

CVE-2018-0233: A vulnerability in the Secure Sockets Layer (SSL) packet reassembly functionality of the detection engine i...

A vulnerability in the Secure Sockets Layer (SSL) packet reassembly functionality of the detection engine in Cisco Firepower System Software could allow an unauthenticated, remote attacker to cause the detection engine to consume excessive system memory on an affected device, which could cause a denial of service (DoS) condition. The vulnerability is due to the affected software improperly handling changes to SSL connection states. An attacker could exploit this vulnerability by sending crafted SSL connections through an affected device. A successful exploit could allow the attacker to cause the detection engine to consume excessive system memory on the affected device, which could cause a DoS condition. The device may need to be reloaded manually to recover from this condition. This vulnerability affects Cisco Firepower System Software Releases 6.0.0 and later, running on any of the following Cisco products: Adaptive Security Appliance (ASA) 5500-X Series Firewalls with FirePOWER Services, Adaptive Security Appliance (ASA) 5500-X Series Next-Generation Firewalls, Advanced Malware Protection (AMP) for Networks, 7000 Series Appliances, Advanced Malware Protection (AMP) for Networks, 8000 Series Appliances, Firepower 4100 Series Appliances, FirePOWER 7000 Series Appliances, FirePOWER 8000 Series Appliances, Firepower 9300 Series Security Appliances, Firepower Threat Defense for Integrated Services Routers (ISRs), Firepower Threat Defense Virtual for VMware, Industrial Security Appliance 3000, Sourcefire 3D System Appliances. Cisco Bug IDs: CSCve23031.

UnknownCVSS not scoredNot KEV-listedUpdated
Glexia's TakeAutomated analysis

Security readout for executives and security teams

This flaw can let an unauthenticated remote attacker exhaust memory in Cisco Firepower’s detection engine by sending specially crafted SSL connections through an affected device. The practical business risk is loss or degradation of a security control, potentially requiring a manual reload to recover. Exposure is likely where Cisco Firepower System Software 6.0.0 or later runs on the listed ASA FirePOWER, Firepower, AMP for Networks, ISR FTD, virtual FTD, ISA 3000, or Sourcefire 3D platforms and processes SSL traffic through the detection engine. Treat this as a high-priority availability risk for affected Cisco security appliances. It can disable or impair inspection capability and may require manual intervention, so prioritize validation and vendor-guided remediation on perimeter and critical network paths. Mitigation focus: Identify affected Cisco Firepower deployments and software releases.; Review Cisco advisory cisco-sa-20180418-fpsnort and bug CSCve23031 for vendor fixes or workarounds.; Prioritize upgrades or mitigations for internet-edge and high-throughput inspection points..

Prepared

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Potential ATT&CK relevance

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CVE-2018-0233 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/aCisco Firepower Detection EngineCisco Firepower Detection EngineListed
Weakness

CWE details

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CWE-400 · source CWE mapping

Uncontrolled Resource Consumption

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