| Name | CVE-2024-1135 |
| Description | Gunicorn fails to properly validate Transfer-Encoding headers, leading to HTTP Request Smuggling (HRS) vulnerabilities. By crafting requests with conflicting Transfer-Encoding headers, attackers can bypass security restrictions and access restricted endpoints. This issue is due to Gunicorn's handling of Transfer-Encoding headers, where it incorrectly processes requests with multiple, conflicting Transfer-Encoding headers, treating them as chunked regardless of the final encoding specified. This vulnerability allows for a range of attacks including cache poisoning, session manipulation, and data exposure. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3851-1, DLA-3996-1 |
| Debian Bugs | 1069126 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| gunicorn (PTS) | bullseye | 20.1.0-1 | vulnerable |
| bullseye (security) | 20.1.0-1+deb11u1 | fixed | |
| bookworm | 20.1.0-6 | vulnerable | |
| sid, trixie | 23.0.0-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| gunicorn | source | buster | 19.9.0-1+deb10u1 | DLA-3851-1 | ||
| gunicorn | source | bullseye | 20.1.0-1+deb11u1 | DLA-3996-1 | ||
| gunicorn | source | (unstable) | 22.0.0-1 | 1069126 |
[bookworm] - gunicorn <no-dsa> (Minor issue)
[buster] - gunicorn <postponed> (Minor issue)
https://huntr.com/bounties/22158e34-cfd5-41ad-97e0-a780773d96c1
https://github.com/benoitc/gunicorn/commit/ac29c9b0a758d21f1e0fb3b3457239e523fa9f1d