Security readout for executives and security teams
Plain-English summary
CVE-2020-35141 is a denial-of-service issue in Faucet SDN Ryu 4.34. A remote attacker may be able to trigger an infinite loop in OpenFlow queue configuration reply parsing, potentially making the SDN controller unavailable. Public sources do not provide CVSS scoring, confirmed exploitation, or a named patch.
Executive priority
Treat this as a targeted availability risk for organizations using Faucet SDN Ryu 4.34. Escalate if the software supports production network control, because controller unavailability can disrupt dependent network operations.
Technical view
The issue is reported in OFPQueueGetConfigReply handling in parser.py for Faucet SDN Ryu 4.34. The described failure mode is an infinite loop reachable by a remote attacker, resulting in DoS. The source bundle does not include CWE mapping, exploit details, fixed version data, or mitigation specifics.
Likely exposure
Exposure is most relevant where Faucet SDN Ryu 4.34 is deployed in production SDN control-plane roles and processes remotely supplied OpenFlow messages. The bundle does not identify other affected versions or products.
Exploitation context
The CVE source describes remote DoS potential but does not cite active exploitation. KEV is false in the supplied bundle, so there is no provided evidence of known exploited status.
Researcher notes
Evidence is sparse. The record names a specific parser path and infinite-loop DoS condition, but lacks CVSS, CWE, fixed version, exploit status, and affected-version range. Avoid broad product assumptions beyond the stated Faucet SDN Ryu 4.34 reference.
Mitigation direction
- Check Faucet SDN/Ryu issue #118 and vendor guidance for fixed versions or workarounds.
- Inventory and prioritize any production Faucet SDN Ryu 4.34 deployments.
- Limit controller exposure to trusted control-plane networks while awaiting confirmed vendor guidance.
- Prepare upgrade or configuration changes only after confirming supported remediation guidance.
Validation and detection
- Confirm whether Faucet SDN Ryu 4.34 is present in production or lab environments.
- Review affected code paths involving OFPQueueGetConfigReply in parser.py.
- Check whether untrusted remote systems can reach the SDN controller message path.
- Review monitoring for controller hangs, repeated restarts, or unexplained DoS symptoms.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2020-35141 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/faucetsdn/ryu/issues/118CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.