DoS Via Malformed URL with Reactor Netty HTTP Server
Summary
| CVE | CVE-2020-5403 |
|---|---|
| State | PUBLISHED |
| Assigner | pivotal |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2020-03-03 19:15:15 UTC |
| Updated | 2026-09-04 18:59:12 UTC |
| Description | Reactor Netty HttpServer, versions 0.9.3 and 0.9.4, is exposed to a URISyntaxException that causes the connection to be closed prematurely instead of producing a 400 response. |
Risk And Classification
Primary CVSS: v3.1 7.5 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.011460000 probability, percentile 0.646710000 (date 2026-09-07)
Problem Types: CWE-20 | CWE-755 | CWE-20 CWE-20: Improper Input Validation
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.0 | [email protected] | Secondary | 6.5 | MEDIUM | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
| 3.0 | CNA | DECLARED | 6.5 | MEDIUM | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
| 2.0 | [email protected] | Primary | 5 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v3.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
RequiredScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
LowAuthentication
NoneConfidentiality
NoneIntegrity
NoneAvailability
PartialAV:N/AC:L/Au:N/C:N/I:N/A:P
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Broadcom | Reactor Netty | 0.9.3 | All | All | All |
| Application | Broadcom | Reactor Netty | 0.9.4 | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Pivotal | Reactor Netty | affected 0.9 v0.9.3.RELEASE | Not specified |
| CNA | Pivotal | Reactor Netty | affected 0.9 v0.9.4.RELEASE | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| CVE-2020-5403: DoS Via Malformed URL with Reactor Netty HTTP Server | Security | VMware Tanzu | af854a3a-2127-422b-91ae-364da2661108 | pivotal.io | Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.