Cisco Firepower Threat Defense Software Snort Out of Memory Denial of Service Vulnerability
Published May 3, 2022
8.6
HIGHCVSS 3.1
EPSS 1.35%
Description
A vulnerability in the Snort detection engine integration for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause unlimited memory consumption, which could lead to a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient memory management for certain Snort events. An attacker could exploit this vulnerability by sending a series of crafted IP packets that would generate specific Snort events on an affected device. A sustained attack could cause an out of memory condition on the affected device. A successful exploit could allow the attacker to interrupt all traffic flowing through the affected device. In some circumstances, the attacker may be able to cause the device to reload, resulting in a DoS condition.
Affected products
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||
|---|---|---|---|---|---|---|
| Cisco | Cisco Firepower Threat Defense Software | n/a |
|
- < 6.4.0.15
- ≥ 6.5.0 · < 6.6.5.2
- ≥ 7.0.0 · < 7.0.2
- 7.1.0.0
Running on/with
- n/a
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No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1 other source (CVE.org) ▾
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Nov 6, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.35% (0.01346) | 70.41th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.23% (0.01230) | 64.91th | v5 (v2026.06.15) |
| May 4, 2025 | 1.77% (0.01766) | 81.61th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.45% (0.00446) | 61.38th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.14% (0.00140) | 51.12th | v3 (v2023.03.01) |
| Nov 23, 2023 | 0.14% (0.00137) | 49.11th | v3 (v2023.03.01) |
| Oct 13, 2023 | 0.13% (0.00130) | 47.54th | v3 (v2023.03.01) |
| May 9, 2023 | 0.12% (0.00118) | 44.44th | v3 (v2023.03.01) |
| May 8, 2023 | 0.07% (0.00075) | 30.34th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00063) | 24.76th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Oct 25, 2022 | 1.05% (0.01055) | 50.81th | v2 (v2022.01.01) |
| May 3, 2022 | 1.05% (0.01055) | 48.81th | v2 (v2022.01.01) |
References (1)
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-snort-dos-hd2hFgM vendor-advisoryx_refsource_CISCOVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-snort-dos-hd2hFgM | vendor-advisoryx_refsource_CISCOVendor Advisory |
Change history (0)
No recorded changes yet.