CVE catalog
CVE-2024-14029
Tornado before 6.4.1 ignores duplicate Transfer-Encoding: chunked headers, treating requests as having no message body and parsing the chunked body as a subsequent request. Attackers can exploit this
- Severity
- Critical · CVSS 9
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.36% · Oct 25, 2026
Tornado before 6.4.1 ignores duplicate Transfer-Encoding: chunked headers, treating requests as having no message body and parsing the chunked body as a subsequent request. Attackers can exploit this inconsistency when Tornado is deployed behind proxies to perform HTTP request smuggling, enabling access control bypass, cache poisoning, or connection desynchronization.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | python-tornado | sid | 6.5.5-5 | fixed |
| Debian | python-tornado | forky | 6.5.5-5 | fixed |
| Debian | python-tornado | trixie | 6.4.2-3+deb13u2 | fixed |
| Debian | python-tornado | trixie-security | 6.4.2-3+deb13u2 | fixed |
| Debian | python-tornado | bookworm | 6.2.0-3+deb12u4 | vulnerable |
| Debian | python-tornado | bookworm-security | 6.2.0-3+deb12u4 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-1build1 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-2 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-3 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-3build1 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-3ubuntu0.1~esm1 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-3ubuntu0.1~esm2 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-3ubuntu0.1~esm4 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-3ubuntu0.1~esm5 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-3ubuntu0.1~esm6 | fixed |
| Ubuntu | python-tornado | 24.04 | 6.3.2-1 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-0ubuntu1 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-1 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-1build1 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-1ubuntu0.1 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-1ubuntu0.2 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-1ubuntu0.4 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-1ubuntu0.5 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-1ubuntu0.6 | fixed |
| Ubuntu | python-tornado | noble | 6.4.0-1ubuntu0.6 | fixed |
| Ubuntu | python-tornado-doc | noble | 6.4.0-1ubuntu0.6 | fixed |
| Ubuntu | python3-tornado | noble | 6.4.0-1ubuntu0.6 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | python-tornado | source | sid | 6.4.1-1 | not yet assigned | Not reported | Not reported |
| Debian | python-tornado | source | forky | 6.4.1-1 | not yet assigned | Not reported | Not reported |
| Debian | python-tornado | source | trixie | 6.4.1-1 | not yet assigned | Not reported | Not reported |
| Debian | python-tornado | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Ubuntu | python-tornado | deb | pro | 6.1.0-3ubuntu0.1~esm6 | Not reported | UBUNTU-CVE-2024-14029 | Not reported |
| Ubuntu | python-tornado | deb | 24.04 | 6.4.0-1ubuntu0.6 | Not reported | UBUNTU-CVE-2024-14029 | Not reported |
| Ubuntu | python-tornado | deb | noble | 6.4.0-1ubuntu0.6 | Not reported | Not reported | Not reported |
| Ubuntu | python-tornado-doc | deb | noble | 6.4.0-1ubuntu0.6 | Not reported | Not reported | Not reported |
| Ubuntu | python3-tornado | deb | noble | 6.4.0-1ubuntu0.6 | Not reported | Not reported | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2024_10590.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2024-14029]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2024-14029]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2024-14029]
- [https://security-tracker.debian.org/tracker/CVE-2024-14029]
- [https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-14029.json]
- [https://ubuntu.com/security/notices/USN-8952-1]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]