🛡️ CVE-2020-35139 — ryu

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-770 OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

FaucetSDN Ryu Denial of Service Vulnerability

An issue was discovered in OFPBundleCtrlMsg in parser.py in FaucetSDN Ryu version 4.34, allows remote attackers to cause a denial of service (DoS) (infinite loop).

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2020-35139 is classified as CWE-770: Allocation of Resources Without Limits. Resources are allocated on request with no cap, so a client can exhaust them.

Affected software

CVE-2020-35139 is recorded against 1 package.

  • ryu

Timeline and source

Published on 11 August 2023 and last revised on 7 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Advisory)
github.com (Web)
github.com (Package)

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-770
Public Exploit ✅ No
Source OSV
Published 2023-08-11
Updated 2026-08-12
Modified 2026-07-07
Fix URL N/A

Affected Packages

Software From version Fixed in
ryu — —

Similar Threats

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