A vulnerability in the UDP processing code of Cisco IOS 15.1, 15.2, and 15.4 and IOS XE 3.14 through 3.18 could allow an unauthenticated, remote attacker to cause the input queue of an affected system to hold UDP packets, causing an interface queue wedge and a denial of service (DoS) condition
Published Sep 7, 2017 ·Due Mar 24, 2022
7.5
HIGHCVSS 3.1
EPSS 6.16%
Description
A vulnerability in the UDP processing code of Cisco IOS 15.1, 15.2, and 15.4 and IOS XE 3.14 through 3.18 could allow an unauthenticated, remote attacker to cause the input queue of an affected system to hold UDP packets, causing an interface queue wedge and a denial of service (DoS) condition. The vulnerability is due to Cisco IOS Software application changes that create UDP sockets and leave the sockets idle without closing them. An attacker could exploit this vulnerability by sending UDP packets with a destination port of 0 to an affected device. A successful exploit could allow the attacker to cause UDP packets to be held in the input interfaces queue, resulting in a DoS condition. The input interface queue will stop holding UDP packets when it receives 250 packets. Cisco Bug IDs: CSCup10024, CSCva55744, CSCva95506.
Affected products
- Vendor n/a Product Cisco IOS and Cisco IOS XE Defaultn/a
- Version Cisco IOS and Cisco IOS XEStatusaffectedConstraints-
- 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 IOS and Cisco IOS XE | n/a |
|
- 15.1\(2\)gc
- 15.1\(2\)gc1
- 15.1\(2\)gc2
- 15.1\(4\)gc
- 15.1\(4\)gc1
- 15.1\(4\)gc2
- 15.2\(1\)gc
- 15.2\(1\)gc1
- 15.2\(1\)gc2
- 15.2\(2\)gc
- 15.2\(3\)gc
- 15.2\(3\)gc1
- 15.2\(3r\)gca
- 15.2\(4\)gc
- 15.2\(4\)gc1
- 15.2\(4\)gc2
- 15.2\(4\)gc3
- 15.4\(1\)t
- 15.4\(1\)t1
- 15.4\(1\)t2
- 15.4\(1\)t3
- 15.4\(1\)t4
- 15.4\(2\)t
- 15.4\(2\)t1
- 15.4\(2\)t2
- 15.4\(3\)m
- 15.4\(3\)m1
- 15.4\(3\)m2
- 15.4\(3\)m2.2
- 15.4\(3\)m3
- 15.4\(3\)m4
- 15.4\(3\)m5
- 15.4\(3\)m6
- 15.4\(3\)m6a
- 15.4\(3\)m7
- 3.14.0s
- 3.14.1s
- 3.14.2s
- 3.14.3s
- 3.14.4s
- 3.15.0s
- 3.15.1cs
- 3.15.1s
- 3.15.2s
- 3.15.3s
- 3.15.4s
- 3.16.0cs
- 3.16.0s
- 3.16.1as
- 3.16.1s
- 3.16.2as
- 3.16.2bs
- 3.16.2s
- 3.16.3as
- 3.16.3s
- 3.16.4as
- 3.16.4bs
- 3.16.4ds
- 3.16.4s
- 3.16.5s
- 3.16.6s
- 3.17.0s
- 3.17.1as
- 3.17.1s
- 3.17.3s
- 3.18.0as
- 3.18.0s
- 3.18.1s
- 3.18.2s
- 3.18.3s
- 3.18.3vs
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
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
Date Added
Mar 3, 2022
Patch Due
Mar 24, 2022
Required Action
Apply updates per vendor instructions.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
ActiveAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Feb 4, 2025 · 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 (22 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 6.16% (0.06158) | 93.26th | v5 (v2026.06.15) |
| Jun 15, 2026 | 6.04% (0.06042) | 92.41th | v5 (v2026.06.15) |
| Nov 21, 2025 | 10.89% (0.10886) | 93.09th | v4 (v2025.03.14) |
| Nov 18, 2025 | 2.19% (0.02186) | 83.02th | v4 (v2025.03.14) |
| Apr 13, 2025 | 10.89% (0.10886) | 92.75th | v4 (v2025.03.14) |
| Mar 30, 2025 | 13.83% (0.13834) | 93.69th | v4 (v2025.03.14) |
| Mar 29, 2025 | 38.90% (0.38904) | 95.88th | v4 (v2025.03.14) |
| Mar 17, 2025 | 13.83% (0.13834) | 93.77th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.36% (0.00360) | 72.50th | v3 (v2023.03.01) |
| May 20, 2024 | 0.36% (0.00360) | 72.17th | v3 (v2023.03.01) |
| Mar 3, 2024 | 0.43% (0.00430) | 73.89th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.30% (0.00303) | 68.84th | v3 (v2023.03.01) |
| Mar 10, 2023 | 0.30% (0.00303) | 64.89th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.33% (0.00333) | 66.56th | 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 (4)
- http://www.securityfocus.com/bid/100644 vdb-entryx_refsource_BIDBroken LinkThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039289 vdb-entryx_refsource_SECTRACKBroken LinkThird Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-ios-udp x_refsource_CONFIRMMitigationVendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6627 government-resourceUS Government Resource
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/100644 | vdb-entryx_refsource_BIDBroken LinkThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1039289 | vdb-entryx_refsource_SECTRACKBroken LinkThird Party AdvisoryVDB Entry | |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-ios-udp | x_refsource_CONFIRMMitigationVendor Advisory | |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6627 | government-resourceUS Government Resource |
Change history (0)
No recorded changes yet.