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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.05% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 80.9% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2023-09-21 00:00Z3 YR AGO
- Last updated
- 2024-08-02 19:44Z2 YR AGO
- Reserved
- 2023-09-21
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- No CWE assigned
- Data version
- 5.1
- Document digest
- a2b18bac4719d79d4b5a781d594f25313bb7614cf95adefd61814ec51ab834e1
05 Affected products
06 References
- github.comhttps://github.com/snapview/tungstenite-rs/issues/376
- cwe.mitre.orghttps://cwe.mitre.org/data/definitions/407.html
- crates.iohttps://crates.io/crates/tungstenite/versions
- github.comhttps://github.com/snapview/tungstenite-rs/commit/8b3ecd3cc0008145ab4bc8d0657c39d09db8c7e2
- github.comhttps://github.com/advisories/GHSA-9mcr-873m-xcxp
- github.comhttps://github.com/github/advisory-database/pull/2752
- bugzilla.suse.comhttps://bugzilla.suse.com/show_bug.cgi?id=1215563
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2240110
- security-tracker.debian.orghttps://security-tracker.debian.org/tracker/CVE-2023-43669
- lists.fedoraproject.orgFEDORA-2023-91a66898d2https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THK6G6CD4VW6RCROWUV2C4HSINKK3XAK/
- lists.fedoraproject.orgFEDORA-2023-e72bf7b92ehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TT7SF6CQ5VHAGFLWNXY64NFSW4WIWE7D/
- lists.fedoraproject.orgFEDORA-2023-9c4142423ahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R77EUWPZVP5WSMNXUXUDNHR7G7OI5NGM/
07 Fixed in
Debian 13
- rust-tungstenite Fixed in 0.20.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- rust-tungstenite Fixed in 0.20.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- rust-tungstenite No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- rust-tungstenite No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- rust-tungstenite No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.10
- rust-tungstenite No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.