A vulnerability in the Session Initiation Protocol (SIP) UDP throttling process of Cisco Unified Communications Manager (Cisco Unified CM) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device
Published Apr 20, 2017
7.5
HIGHCVSS 3.0
EPSS 2.48%
Description
A vulnerability in the Session Initiation Protocol (SIP) UDP throttling process of Cisco Unified Communications Manager (Cisco Unified CM) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient rate limiting protection. An attacker could exploit this vulnerability by sending the affected device a high rate of SIP messages. An exploit could allow the attacker to cause the device to reload unexpectedly. The device and services will restart automatically. This vulnerability affects Cisco Unified Communications Manager (CallManager) releases prior to the first fixed release; the following list indicates the first minor release that includes the fix for this vulnerability: 10.5.2.14900-16 11.0.1.23900-5 11.5.1.12900-2. Cisco Bug IDs: CSCuz72455.
Affected products
- Vendor n/a Product Cisco Unified Communications Manager Defaultn/a
- Version Cisco Unified Communications ManagerStatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Cisco Unified Communications Manager | n/a |
|
- 10.0\(1.10000.12\)
- 10.0_base
- 10.5\(0.98000.88\)
- 10.5\(1.98991.13\)
- 10.5\(1.99995.9\)
- 10.5\(2.10000.5\)
- 10.5\(2.12901.1\)
- 10.5\(2.13900.9\)
- 10.5\(3.10000.9\)
- 10.5_base
- 11.0\(0.98000.225\)
- 11.0\(1.10000.10\)
- 11.5\(0.98000.480\)
- 11.5\(0.98000.486\)
- 11.5\(0.99838.4\)
- 11.5\(1.2\)
- 11.5\(1.10000.6\)
- 11.5\(1.11007.2\)
- 11.5\(1.12000.1\)
- 11.5.0
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:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 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 (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 2.48% (0.02479) | 84.01th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.48% (0.02479) | 82.43th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.43% (0.00429) | 60.42th | v4 (v2025.03.14) |
| Dec 17, 2024 | 0.24% (0.00236) | 61.23th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.36% (0.00356) | 71.26th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.36% (0.00356) | 67.60th | 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/97922 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1038318 vdb-entryx_refsource_SECTRACK
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-ucm x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/97922 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1038318 | vdb-entryx_refsource_SECTRACK | |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170419-ucm | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.