An issue was discovered in OFPBundleCtrlMsg in parser.py in Faucet SDN Ryu version 4.34…
Priority HIGH 72CWE-835Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-835.
Summary
An issue was discovered in OFPBundleCtrlMsg in parser.py in Faucet SDN Ryu version 4.34, allows remote attackers to cause a denial of service (DoS) (infinite loop).
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00954 61st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | ryu (PyPI) | up to 4.34 | — | No fix listed | GHSA-4987-5p3p-9r27 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- ryu (PyPI) Vendor— Affected up to 4.34 Fixed in — No fix listed GHSA-4987-5p3p-9r27
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-35139
- 2026-10-03 Alias added: GHSA-4987-5p3p-9r27
References
More Faucet Ryu vulnerabilities
- TI-2020-17850 An issue was discovered in OFPQueueGetConfigReply in parser.py in Faucet SDN Ryu version… CVSS 3.1HIGH 7.5
Sources
- CVE-2020-35139 · CVE Program
- CVE-2020-35139 · NVD
- FIRST EPSS
- GHSA-4987-5p3p-9r27 · GitHub Advisory Database · CC BY 4.0
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