Cisco Prime Access Registrar Denial of Service Vulnerability
Published Oct 5, 2018
8.6
HIGHCVSS 3.0
EPSS 3.48%
Description
A vulnerability in TCP connection management in Cisco Prime Access Registrar could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition when the application unexpectedly restarts. The vulnerability is due to incorrect handling of incoming TCP SYN packets to specific listening ports. The improper handling of the TCP SYN packets could cause a system file description to be allocated and not freed. An attacker could exploit this vulnerability by sending a crafted stream of TCP SYN packets to the application. A successful exploit could allow the attacker to cause the application to eventually restart if a file description cannot be obtained.
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 Prime Access Registrar | n/a |
|
- ≥ 7.3 · < 7.3.0.4
- ≥ 8.0 · < 8.0.1.1
- ≥ 7.3 · < 7.3.0.4
- ≥ 8.0 · < 8.0.1.1
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.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:P
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 25, 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
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (24 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.48% (0.03480) | 88.72th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.48% (0.03480) | 87.55th | v5 (v2026.06.15) |
| Sep 13, 2025 | 1.49% (0.01495) | 80.42th | v4 (v2025.03.14) |
| Mar 30, 2025 | 2.75% (0.02746) | 84.70th | v4 (v2025.03.14) |
| Mar 29, 2025 | 4.80% (0.04804) | 82.09th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.75% (0.02746) | 85.02th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.20% (0.00198) | 58.66th | v3 (v2023.03.01) |
| Jun 20, 2024 | 0.20% (0.00198) | 57.56th | v3 (v2023.03.01) |
| Apr 24, 2024 | 0.20% (0.00204) | 58.04th | v3 (v2023.03.01) |
| Mar 7, 2024 | 0.27% (0.00271) | 67.18th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.30% (0.00298) | 68.60th | v3 (v2023.03.01) |
| Sep 29, 2023 | 0.32% (0.00323) | 67.17th | v3 (v2023.03.01) |
| Aug 11, 2023 | 0.28% (0.00282) | 64.44th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.30% (0.00300) | 65.29th | v3 (v2023.03.01) |
| May 21, 2023 | 0.36% (0.00364) | 68.24th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.47% (0.00472) | 71.86th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.14% (0.01136) | 59.45th | v2 (v2022.01.01) |
| Oct 18, 2022 | 1.14% (0.01136) | 58.28th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.14% (0.01136) | 56.27th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.14% (0.01136) | 34.23th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.30% (0.01300) | 31.12th | v1 |
| Jan 6, 2022 | 1.30% (0.01300) | 30.48th | v1 |
| Sep 1, 2021 | 1.30% (0.01300) | 69.44th | v1 |
| Apr 14, 2021 | 1.30% (0.01300) | 0.00th | v1 |
References (3)
- http://www.securityfocus.com/bid/105282 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041684 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180905-cpar-dos vendor-advisoryx_refsource_CISCOVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/105282 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1041684 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180905-cpar-dos | vendor-advisoryx_refsource_CISCOVendor Advisory |
Change history (0)
No recorded changes yet.