CVE-2023-43669
HIGHCVSS 7.5/10EPSS 1.62%
Last modified
CVE-2023-43669 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The Tungstenite crate before 0.20.1 for Rust allows remote attackers to cause a denial of service (minutes of CPU consumption) via an excessive length of an HTTP header in a client handshake. The length affects both how many times a parse is attempted (e.g., thousands of times) and the average amount of data for each parse attempt (e.g., millions of bytes).. EPSS estimates a 1.62% chance of exploitation in the next 30 days.
Description
The Tungstenite crate before 0.20.1 for Rust allows remote attackers to cause a denial of service (minutes of CPU consumption) via an excessive length of an HTTP header in a client handshake. The length affects both how many times a parse is attempted (e.g., thousands of times) and the average amount of data for each parse attempt (e.g., millions of bytes).
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Snapview | Tungstenite | <= 0.20.0 |
| Fedoraproject | Fedora | 37 |
| Fedoraproject | Fedora | 38 |
| Fedoraproject | Fedora | 39 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2240110Issue Tracking, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1215563Issue Tracking, Third Party Advisory
- https://crates.io/crates/tungstenite/versionsRelease Notes
- https://cwe.mitre.org/data/definitions/407.htmlTechnical Description
- https://github.com/advisories/GHSA-9mcr-873m-xcxpThird Party Advisory
- https://github.com/snapview/tungstenite-rs/issues/376Exploit, Issue Tracking
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R77EUWPZVP5WSMNXUXUDNHR7G7OI5NGM/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THK6G6CD4VW6RCROWUV2C4HSINKK3XAK/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TT7SF6CQ5VHAGFLWNXY64NFSW4WIWE7D/Mailing List, Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2023-43669Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2240110Issue Tracking, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1215563Issue Tracking, Third Party Advisory
- https://crates.io/crates/tungstenite/versionsRelease Notes
- https://cwe.mitre.org/data/definitions/407.htmlTechnical Description
- https://github.com/advisories/GHSA-9mcr-873m-xcxpThird Party Advisory
- https://github.com/snapview/tungstenite-rs/issues/376Exploit, Issue Tracking
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R77EUWPZVP5WSMNXUXUDNHR7G7OI5NGM/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THK6G6CD4VW6RCROWUV2C4HSINKK3XAK/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TT7SF6CQ5VHAGFLWNXY64NFSW4WIWE7D/Mailing List, Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2023-43669Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2023-43669?
The Tungstenite crate before 0.20.1 for Rust allows remote attackers to cause a denial of service (minutes of CPU consumption) via an excessive length of an HTTP header in a client handshake. The length affects both how many times a parse is attempted (e.g., thousands of times) and the average amount of data for each parse attempt (e.g., millions of bytes).
How severe is CVE-2023-43669?
CVE-2023-43669 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.62% probability of exploitation in the next 30 days.
How do I fix CVE-2023-43669?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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