A vulnerability in the UDP broadcast forwarding function of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on the affected device
Published Apr 19, 2018
7.4
HIGHCVSS 3.0
EPSS 0.82%
Description
A vulnerability in the UDP broadcast forwarding function of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on the affected device. The vulnerability is due to improper handling of UDP broadcast packets that are forwarded to an IPv4 helper address. An attacker could exploit this vulnerability by sending multiple UDP broadcast packets to the affected device. An exploit could allow the attacker to cause a buffer leak on the affected device, eventually resulting in a DoS condition requiring manual intervention to recover. This vulnerability affects all Cisco IOS XR platforms running 6.3.1, 6.2.3, or earlier releases of Cisco IOS XR Software when at least one IPv4 helper address is configured on an interface of the device. Cisco Bug IDs: CSCvi35625.
Affected products
- Vendor n/a Product Cisco IOS XR Defaultn/a
- Version Cisco IOS XRStatusaffectedConstraints-
- 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 XR | n/a |
|
- 4.0.4.base
- 4.1.3.base
- 4.2.4.base
- 4.3.4.base
- 4.4.3.ce
- 5.0.3.ce
- 5.1.4.base
- 5.2.5.ce
- 5.3.4.base
- 5.4.3.ce
- 6.0.4.base
- 6.1.4.base
- 6.2.3.base
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:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
AV:A/AC:L/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
NoTechnical Impact
PartialDecision
n/aAssessed Nov 29, 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 v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.82% (0.00823) | 55.77th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.84% (0.00839) | 56.27th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.09% (0.00092) | 39.68th | v3 (v2023.03.01) |
| Oct 20, 2023 | 0.09% (0.00092) | 38.77th | v3 (v2023.03.01) |
| Sep 10, 2023 | 0.10% (0.00101) | 40.78th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.12% (0.00123) | 45.99th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.11% (0.00106) | 41.40th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00954) | 16.28th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.04% (0.01036) | 27.56th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.04% (0.01036) | 0.00th | v1 |
References (3)
- http://www.securityfocus.com/bid/103929 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040710 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-iosxr x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/103929 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1040710 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-iosxr | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.